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| 169498 | PEM | Scheduled | Scheduled | 1 | 00-NLCTA | Modulators | - | - | - | - | Repair small pump used on NLCTA Station 2 (Pump switch located in rack B062-MOD2A1) to pump oil back | 911 | HW Problem |
| 173968 | PEM | Scheduled | Scheduled | 1 | 00-NLCTA | Modulators | - | - | - | Morris, Ben | S-Band & Station 3: Verify 60Hz operational limit of trigger circuitry. | 680 | HW Install/Removal/Modify |
| 183240 | PEM | Scheduled | Scheduled | 3 | 00-NLCTA | Modulators | - | - | - | Morris, Ben | STA1: Replace missing oil and verify heat exchanger is safe for operation. | 197 | HW Problem |
| 156080 | PEM | Scheduled | Scheduled | 1 | 05-STN2 | Modulators | - | - | - | Morris, Ben | Station 2 Secondary containment oil pump not working. | 1645 | HW Problem |
| 176124 | PEM | Scheduled | Scheduled | 1 | 08-2PACK | Modulators | - | - | - | Morris, Ben | 2-PACK: Lock out and repair 4 HV boards showing signs of power supply failure. | 559 | HW Problem |
| 180987 | PEM | Scheduled | Scheduled | 1 | 08-2PACK | Modulators | - | - | - | Morris, Ben | 2-PACK Oil Replacement | 321 | HW Preventative Maintenance |
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| 186130 | AMRF | Scheduled | Scheduled | 3 | ALL | RF SPEAR | - | - | - | Sebek, Jim J. | 2026 Startup NIRP Surveys | 8 | Administrative Activity |
| 185260 | KLY | Immediate | In Progress | 0 | BOOSTER | RF Booster | - | - | - | Sebek, Jim J. | SSA voltage lowered after output power fault. SSA voltage desired set point has magenta status. | 82 | HW Problem |
| 176571 | PEM | LowPriority | In Progress | 0 | BOOSTER | RF Booster | - | - | - | Sebek, Jim J. | SSA tripped off on LCW cavity 3 fault (see CATER 176482) during the 1840 fill on 4/8/25. Although th | 539 | HW Problem |
| 184297 | PEM | Scheduled | In Progress | 0 | BOOSTER | Pulsed Power Supplies | - | - | - | Beukers, Tony | Suspect small timing shifts in Booster Injection Kicker 2 are causing beam losses. Please see. Ampli | 139 | HW Problem |
| 184563 | PEM | Scheduled | Scheduled | 1 | BOOSTER | Pulsed Power Supplies | - | - | - | Morris, Ben | Booster Kickers: Install new matching resistor network | 120 | HW Preventative Maintenance |
| 185817 | PEM | Scheduled | Scheduled | 4 | BOOSTER | DC Power Supplies | - | - | - | - | Troubleshoot QF string in booster tunnel. This will require ZVV. | 20 | HW Problem |
| 186163 | PEM | Scheduled | Scheduled | 1 | BOOSTER | Pulsed Power Supplies | - | - | - | Morris, Ben | Booster kickers: check and calibrate extraction kicker voltage readback. | 7 | HW Problem |
| 185849 | PEM | Scheduled | Scheduled | 2 | LINAC | Modulators | - | - | - | Morris, Ben | Modulators: resolve issues that come up during testing. | 20 | HW Problem |
| 185366 | AMRF | Scheduled | New | 0 | SPEAR | RF SPEAR | - | - | - | - | Beam loss at 2329 on 7/16/26. SPEAR RF contactor opened due to momentary flicker in PPS ok status. | 75 | HW Problem |
| 183835 | KLY | Immediate | New | 0 | SPEAR | RF SPEAR | - | - | - | - | SPEAR RF klystron Cavity A Body 7 temperature spike coincides with beam loss. | 167 | HW Problem |
| 177118 | PEM | Scheduled | In Progress | 0 | SPEAR | RF SPEAR | - | - | - | Sebek, Jim J. | SPEAR HVPS2 tripped and contactor opened at 1514 on 4/29/25. System manager found no obvious cause a | 517 | HW Problem |
| 180625 | PEM | Scheduled | In Progress | 3 | SPEAR | DC Power Supplies | - | - | - | Hoover, Chris S. | TSP system AC power reconfiguration. Allow running TSPs in Permitted Access. | 337 | Administrative Activity |
| 182792 | PEM | Scheduled | In Progress | 2 | SPEAR | DC Power Supplies | - | - | - | Nguyen, Alex N. | Take some measurement for TSPs in SPEAR tunnel. | 223 | Project/ Enhancement / Request |
| 184888 | PEM | Downtime | Scheduled | 3 | SPEAR | DC Power Supplies | - | - | - | Harave, Sudarshan | Downtime: Swap out old IE power supplies and replace with new Genesys power supplies | 104 | HW Install/Removal/Modify |
| 185225 | PEM | Scheduled | RevToClose | 2 | SPEAR | DC Power Supplies | - | - | - | Nguyen, Alex N. | Downtime: SPEAR ZVV for summer downtime on 7/21/2026 | 69 | Project/ Enhancement / Request |
| 186182 | PEM | Scheduled | Scheduled | 1 | SPEAR | DC Power Supplies | - | - | - | Nguyen, Alex N. | Top left fan on the back of rack B118-01 is running slow and needs to be replaced. | 6 | HW Problem |
| 186193 | PEM | Scheduled | Scheduled | 2 | SPEAR | DC Power Supplies | - | - | - | Nguyen, Alex N. | Voltage ratio for 16G-QF1 is incorrectly state. Needs to calibrate to the correct ratio. | 5 | HW Install/Removal/Modify |
| 186203 | PEM | Scheduled | Scheduled | 1 | SPEAR | DC Power Supplies | - | - | - | Nguyen, Alex N. | All EMCOR modules in 118-EMCOR21 have blinking RED LEDs, could not reset from EDM or front panel. | 5 | HW Problem |
| 186245 | PEM | Scheduled | Scheduled | 1 | SPEAR | DC Power Supplies | - | - | - | - | Replace ELZET module that talks to bitbus controllers to try and alleviate communication dropouts. | 1 | HW Problem |
| 186251 | PEM | Immediate | In Progress | 0 | SPEAR | Other | - | - | - | Nguyen, Alex N. | 09G-COR2V IMON drifts from its setpoint causing the state to go from 'good' to 'warning' | 1 | HW Problem |
| 186263 | PEM | Immediate | Scheduled | 2 | SPEAR | DC Power Supplies | - | - | - | Nguyen, Alex N. | SPEAR ZVV for BL-9 leak troubleshoot and repair | 0 | HW Problem |
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| 157018 | AMRF | Scheduled | In Progress | 0 | ACR | EVENT | - | - | - | Steele, David A. | SBST29 PAD (PCAV3 and PRL) is assigned to the incorrect trigger. Should be TRIG:LI29:214. Currently | 1601 | SW Problem/Bug |
| 166097 | PEM | Scheduled | In Progress | 0 | B015 | DC MAGNETS | - | - | - | Tagle, Jerico | B015: Power Supply Repairs/Testing | 1084 | HW Problem |
| 166098 | PEM | Scheduled | In Progress | 0 | B015 | DC MAGNETS | - | - | - | Tagle, Jerico | B015: EPSC & Bit bus Controller Testing/Repairs | 1084 | HW Problem |
| 173750 | PEM | Scheduled | In Progress | 1 | B015 | DC MAGNETS | - | - | - | Matei, Octavian I. | Train Roger & Eddy on MKSUs, Glassmans, VGC, PS, etc repairs | 691 | HW Preventative Maintenance |
| 173985 | PEM | Scheduled | In Progress | 0 | B015 | DC MAGNETS | - | - | - | Tagle, Jerico | SPEAR Chopper Spares Repairs | 679 | HW Preventative Maintenance |
| 184109 | PEM | Scheduled | Scheduled | 1 | B015 | KLYSTRON / MODULATOR | - | - | - | Tagle, Jerico | The modulator on the back loading dock of B015: strip out wiring and other hardware in order to send | 151 | HW Install/Removal/Modify |
| 174958 | PEM | Scheduled | Scheduled | 8 | BSY | DC MAGNETS | - | - | - | Lam, Briant K. | Inspect A-line bend power supply | 614 | HW Preventative Maintenance |
| 178054 | PEM | Scheduled | Scheduled | 4 | BSY | DC MAGNETS | - | - | - | Lam, Briant K. | Install EMHP 300V-200A power supply for Aline Bend (substitute for Spang) | 476 | HW Install/Removal/Modify |
| 178599 | PEM | Scheduled | In Progress | 0 | BSY | KICKER | - | - | - | Beukers, Tony | SC_SXR spreader kicker signals in BSA but with no data. We see what may be correlation of kick and | 446 | HW Problem |
| 184319 | PEM | Scheduled | In Progress | 0 | BSY | KICKER | - | - | - | Beukers, Tony | KICK:SPH:110 (BKYSP1H) has had many purple/disconnected diagnostic statuses since 3/27 (this may be | 138 | HW Problem |
| 178432 | AMRF | Scheduled | Scheduled | 1 | EBD-FEE | RF | - | - | - | Kelly, Richard S | Updated - High LCLS XTCAV jitter. 0.28 deg RMS jitter, and very unstable on the beam. | 454 | HW Problem |
| 178590 | AMRF | Scheduled | In Progress | 0 | EBD-FEE | RF | - | - | - | Benwell, Andy L | On SC timing the LCLS XTCAV-B having single-shot, ~90 degree phase jumps as seen by the beam kick. | 447 | HW Problem |
| 170907 | AMRF | Downtime | Scheduled | 4 | INJECTOR WEST | RF | - | - | - | Kelly, Richard S | Install Beckhoff assembly in L2KG00-02 Gun Interlock rack. | 841 | HW Install/Removal/Modify |
| 177760 | AMRF | Scheduled | Scheduled | 1 | LCLS-INJ | RF | - | - | - | Benwell, Andy L | Cell 1A cavity probe signal for the gun LLRF system seems to be slowly dropping over time. | 490 | HW Problem |
| 185104 | PEM | Scheduled | Scheduled | 1 | LCLS-INJ | DC MAGNETS | - | - | - | Herr, Chang P | SOL1 SOLN:IN20:121:BACT is a bit more jittery than normal especially around 1-3 AM. Not sure if it h | 91 | HW Problem |
| 186080 | PEM | Scheduled | Scheduled | 2 | LCLS-INJ | KLYSTRON / MODULATOR | KLYS | LI20 | 71 | Chen, Xupeng | L0-A (20-7) having a lot of amplitude hash and causing hash on DL1 energy BPM. | 10 | HW Problem |
| 186208 | PEM | Scheduled | In Progress | 0 | LCLS-INJ | KLYSTRON / MODULATOR | KLYS | LI20 | 61 | Chen, Xupeng | Time accounting: GUN WGV fault at 0649 on 7/25. Recovered after having to lower gun ADES and ramp ba | 4 | HW Problem |
| 186266 | PEM | Scheduled | In Progress | 0 | LCLS-INJ | KLYSTRON / MODULATOR | KLYS | LI20 | 71 | Chen, Xupeng | 20-7 low amplitude | 0 | HW Problem |
| 171316 | AMRF | Scheduled | Scheduled | 7 | LINAC EAST | RF | KLYS | LI26 | 31 | Benwell, Andy L | 26-3 install and test new LLRF system with the klystron and modulator. | 824 | HW Install/Removal/Modify |
| 183787 | AMRF | Scheduled | Scheduled | 1 | LINAC EAST | RF | - | - | - | Kelly, Richard S | PCAV2 signal died over last year: http://physics-elog.slac.stanford.edu/lclselog/show.jsp?dir=/2026/ | 169 | HW Problem |
| 183805 | AMRF | Scheduled | New | 0 | LINAC EAST | RF | - | - | - | - | LI29 Beam Phase Cavity PAD Trig Rate is 0. This happens a lot. Tried rebooting EIOC:LI29:RD01 but it | 168 | HW Problem |
| 184813 | AMRF | Scheduled | Scheduled | 1 | LINAC EAST | KLYSTRON / MODULATOR | KLYS | LI21 | 21 | Kelly, Richard S | Klystron 21-2 having frequent KLT (klystron temp) faults.
Archiving temperature doesn't seem to | 109 | HW Problem |
| 186056 | AMRF | Scheduled | Scheduled | 2 | LINAC EAST | ACM | BCS | LI30 | - | Sikora, John P | ACM in Sector 30 Commissioning | 11 | HW Install/Removal/Modify |
| 178602 | PEM | Scheduled | Scheduled | 2 | LINAC EAST | OTHER | - | - | - | Tagle, Jerico | PEM Gallery Parts Inventory Assessment | 446 | Administrative Activity |
| 178635 | PEM | Scheduled | Scheduled | 4 | LINAC EAST | KLYSTRON / MODULATOR | - | - | - | Beukers, Tony | Downtime LCLS-II HXR/SXR kicker jobs. | 445 | HW Problem |
| 178639 | PEM | Scheduled | Scheduled | 2 | LINAC EAST | KICKER | - | - | - | Beukers, Tony | S30XL kicker downtime jobs. | 445 | HW Problem |
| 184687 | PEM | Scheduled | Scheduled | 1 | LINAC EAST | KICKER | - | - | - | Beukers, Tony | Prepare HXR kicker for BCS tests. | 113 | HW Problem |
| 185242 | PEM | Scheduled | Scheduled | 7 | LINAC EAST | KICKER | - | - | - | Beukers, Tony | Electrical installation work for HE HXR/SXR kickers in tunnel. | 82 | HW Problem |
| 185866 | PEM | Scheduled | Scheduled | 1 | LINAC EAST | KICKER | - | - | - | Beukers, Tony | Access LI28-29 to adjust flow to spreader kicker loads. They were mistakenly left full on. (may affe | 19 | HW Problem |
| 186255 | PEM | Scheduled | In Progress | 0 | LINAC EAST | KLYSTRON / MODULATOR | KLYS | LI21 | 61 | Chen, Xupeng | Klystron 21-6 faulting on thyratron over-current | 1 | HW Problem |
| 185166 | AMRF | Scheduled | Scheduled | 6 | LINAC EAST GALLERY | RF | KLYS | LI26 | 21 | Kelly, Richard S | TBR 26-2 klystron magnet focus trim power supply tripping on ground fault | 89 | HW Problem |
| 185343 | AMRF | Scheduled | Scheduled | 2 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI23 | 31 | Kelly, Richard S | TBR 23-3: faulted on KMC.
uP is unstable. | 76 | HW Problem |
| 185360 | AMRF | Scheduled | Scheduled | 1 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI24 | 51 | Steele, David A. | 24-5: Micro Microperveance OOT, value =1.74 | 75 | HW Problem |
| 185872 | AMRF | Scheduled | Scheduled | 1 | LINAC EAST GALLERY | RF | - | - | - | Kelly, Richard S | NIRP Stations 23-1, 25-2, and 29-7. | 19 | HW Problem |
| 186035 | AMRF | Scheduled | Scheduled | 1 | LINAC EAST GALLERY | RF | KLYS | LI24 | 21 | Kelly, Richard S | Kly 24-2. No PAD readback. | 12 | HW Problem |
| 186047 | AMRF | Scheduled | Scheduled | 1 | LINAC EAST GALLERY | RF | KLYS | LI27 | 51 | Kelly, Richard S | Kly 27-5. Slow oil leak between the pulse tank and the solenoid. The station is otherwise functional | 12 | HW Problem |
| 186123 | AMRF | Scheduled | Scheduled | 1 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI22 | 21 | Chen, Xupeng | 22-1: replace PAD fan. | 8 | HW Problem |
| 186138 | AMRF | Scheduled | Scheduled | 1 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI22 | 51 | Kelly, Richard S | 22-5 chronic phase jitter | 8 | HW Problem |
| 186139 | AMRF | Scheduled | Scheduled | 1 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI23 | 21 | Kelly, Richard S | 23-2 chronic phase jitter with amplitude jitter | 8 | HW Problem |
| 186143 | AMRF | Scheduled | Scheduled | 1 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI26 | 11 | Kelly, Richard S | 26-1 phase jitter | 8 | HW Problem |
| 186144 | AMRF | Scheduled | Scheduled | 1 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI27 | 71 | Kelly, Richard S | 27-7 chronic phase jitter | 8 | HW Problem |
| 186147 | AMRF | Scheduled | Scheduled | 6 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI27 | 11 | Chen, Xupeng | 27-1: KLT (Klys temp) fault | 8 | HW Problem |
| 186187 | AMRF | Scheduled | Scheduled | 1 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI29 | 51 | Kelly, Richard S | 29-5 is showing phase jitter (PHJ on the klystron CUD). Beam volts jitter (0.07 kV) and amplitude ji | 6 | HW Problem |
| 181869 | PEM | Scheduled | Scheduled | 20 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | - | - | - | Hugyik, John | AIP Modulator Contactor Upgrade S27-S30 | 264 | Project/ Enhancement / Request |
| 184691 | PEM | Scheduled | In Progress | 2 | LINAC EAST GALLERY | DC MAGNETS | - | - | - | Herr, Chang P | DASEL Bend Magnet - DKG30-01 BLRDAS - ELP Validation | 113 | HW Preventative Maintenance |
| 185019 | PEM | Scheduled | Scheduled | 1 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI28 | 51 | Chen, Xupeng | 28-5: MOD faulted. Suspiciously timed with fire alarm in S28
See elog entry for pictures | 96 | HW Problem |
| 185537 | PEM | Scheduled | In Progress | 1 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI28 | 51 | Chen, Xupeng | 28-5: Air gap the modulator from any power source | 43 | HW Problem |
| 185701 | PEM | Downtime | Scheduled | 1 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | - | - | - | Chen, Xupeng | LCLS / FACET: Validate the new version ELP for focus Trim PS. | 26 | HW Problem |
| 185746 | PEM | Scheduled | Scheduled | 1 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI27 | 21 | Chen, Xupeng | 27-2: de-Q cable drooping. | 23 | HW Problem |
| 185747 | PEM | Scheduled | Scheduled | 1 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI27 | 31 | Chen, Xupeng | 27-3: MOD Inspection and problems found:
1. Primary resistors: replace lugs and wires .
2. de-Q | 23 | HW Problem |
| 185748 | PEM | Downtime | Scheduled | 1 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI27 | 41 | Chen, Xupeng | 27-4: there is a burnt mark on the pulse cable. see photo. | 23 | HW Problem |
| 185759 | PEM | Scheduled | Scheduled | 1 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI28 | 21 | Chen, Xupeng | 28-2: Primary snubber resistors R260, R261, R262: lugs & wires burnt badly. Replace them. | 21 | HW Problem |
| 185806 | PEM | Scheduled | Scheduled | 2 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI28 | 61 | Chen, Xupeng | 28-6: MOD Inspection and problems found:
1. 120 Vac Distribution panel : 2P28G1B for MOD 28-6, t | 20 | HW Problem |
| 185864 | PEM | Scheduled | Scheduled | 1 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI29 | 51 | Chen, Xupeng | 29-5: MOD Inspection and problems found:
1. R260 resistor bad - replace it.
2. R262 wire bad - r | 19 | HW Problem |
| 185865 | PEM | Scheduled | Scheduled | 1 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI29 | 61 | Chen, Xupeng | 29-6: MOD Inspection and problems found:
1. Pulse cable terminal oxidize.
2. Door #3 bottom hand | 19 | HW Problem |
| 185952 | PEM | Scheduled | Scheduled | 1 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI30 | 41 | Chen, Xupeng | 30-4: MOD Inspection and problems found:
1. de-Qing 2 caps bad - replace them.
2. Door #5: two d | 16 | HW Problem |
| 185954 | PEM | Scheduled | Scheduled | 1 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI30 | 21 | Chen, Xupeng | 30-2: MOD Inspection and problems found:
1. HV cable drooping (PFN cabinet). | 16 | HW Problem |
| 185965 | PEM | Scheduled | Scheduled | 1 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI30 | 51 | Chen, Xupeng | 30-5: MOD Inspection and problems found:
1. replace R260, R261 & R262 and replace wires and lugs. | 15 | HW Problem |
| 185966 | PEM | Scheduled | Scheduled | 1 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI30 | 71 | Chen, Xupeng | 30-7: Grid Trigger chassis: cap lead broken. | 15 | HW Problem |
| 186019 | PEM | Scheduled | Scheduled | 1 | LINAC EAST GALLERY | DC MAGNETS | - | - | - | Herr, Chang P | YCOR:LTUH:133 has a frozen ACT value. The DES value can be changed, and we see effects on beam, howe | 13 | HW Problem |
| 186105 | PEM | Scheduled | In Progress | 0 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI25 | 21 | Chen, Xupeng | 25-2: SCR Fan Rotor Lock. | 9 | HW Problem |
| 186106 | PEM | Scheduled | In Progress | 0 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI25 | 51 | Chen, Xupeng | 25-5: SCR Fan Rotor Lock. | 9 | HW Problem |
| 186108 | PEM | Scheduled | In Progress | 0 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI28 | 41 | Chen, Xupeng | 28-4: SCR Fan Rotor Lock. | 9 | HW Problem |
| 186135 | PEM | Scheduled | In Progress | 0 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI22 | 81 | Chen, Xupeng | 22-8 BVJ, beam volts dropout shots on FTP | 8 | HW Problem |
| 186136 | PEM | Scheduled | In Progress | 0 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI24 | 31 | Chen, Xupeng | 24-3 high beam volts jitter after klystron swap | 8 | HW Problem |
| 186137 | PEM | Scheduled | In Progress | 0 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI21 | 31 | Chen, Xupeng | 21-3 beam volts jitter parked at tolerance | 8 | HW Problem |
| 186145 | PEM | Scheduled | Scheduled | 3 | LINAC EAST GALLERY | KLYSTRON / MODULATOR | KLYS | LI24 | 11 | Chen, Xupeng | 24-1 going into FLK (fault lockout) repeatedly
Tried resetting it twice, but within minu | 8 | HW Problem |
| 186171 | PEM | Scheduled | In Progress | 0 | LINAC EAST GALLERY | SUBBOOSTER | SBST | LI29 | 1 | Chen, Xupeng | SBST29 has started flaking out again. | 6 | HW Problem |
| 186240 | PEM | Scheduled | Scheduled | 1 | LINAC EAST GALLERY | DC MAGNETS | - | - | - | Herr, Chang P | LCLS Replace fan filter on EPSC module in the Linac | 1 | HW Preventative Maintenance |
| 149137 | AMRF | Scheduled | Scheduled | 1 | LINAC MIDDLE (S10-20) | KLYSTRON / MODULATOR | KLYS | LI18 | 11 | Steele, David A. | 18-1 TBR Klystron vacuum bursts when mod HV turned on. | 2051 | HW Problem |
| 162274 | AMRF | Scheduled | In Progress | 0 | LINAC MIDDLE (S10-20) | RF | - | - | - | Steele, David A. | LI14 RF IOC offline. EIOC:LI14:RC01 heartbeat absent. | 1299 | SW Problem/Bug |
| 175973 | AMRF | Scheduled | In Progress | 0 | LINAC MIDDLE (S10-20) | KLYSTRON / MODULATOR | KLYS | LI18 | 51 | Steele, David A. | TBR Klys 18-5: Wave-guide vacuum Fault (Station is currently in MNT Mode.) | 566 | HW Problem |
| 177294 | AMRF | Scheduled | In Progress | 3 | LINAC MIDDLE (S10-20) | KLYSTRON / MODULATOR | KLYS | LI15 | 71 | Steele, David A. | TBR Kly Mod 15-7: MKSU shows hard klystron vac fault. Gamma vacuum controller display shows | 511 | HW Problem |
| 177298 | AMRF | Scheduled | Scheduled | 3 | LINAC MIDDLE (S10-20) | KLYSTRON / MODULATOR | KLYS | LI15 | 81 | Steele, David A. | TBR 15-8 MOD fault, no remote reset, klystron filament light is lit on the modulator | 511 | HW Problem |
| 184631 | AMRF | Scheduled | Scheduled | 1 | LINAC MIDDLE (S10-20) | KLYSTRON / MODULATOR | KLYS | LI18 | 31 | Kelly, Richard S | Klystron 18-3 modulator fault, won't reset remotely | 117 | HW Problem |
| 185110 | PEM | Scheduled | Scheduled | 1 | LINAC MIDDLE (S10-20) | DC MAGNETS | - | - | - | Lam, Briant K. | Connect DOG magnets to power + check out | 91 | HW Install/Removal/Modify |
| 186223 | PEM | Scheduled | In Progress | 0 | LINAC MIDDLE (S10-20) | KLYSTRON / MODULATOR | KLYS | LI19 | - | Chen, Xupeng | LI19 Modulators that are not administratively locked off will not turn on. They immediately trip on | 4 | HW Problem |
| 181170 | AMRF | Scheduled | Scheduled | 7 | LINAC MIDDLE GALLERY | KLYSTRON / MODULATOR | KLYS | LI16 | 41 | Kelly, Richard S | Kly 16-4 TBR.
Leak from solenoid weep hole. | 313 | HW Problem |
| 184088 | AMRF | Scheduled | Scheduled | 7 | LINAC MIDDLE GALLERY | KLYSTRON / MODULATOR | KLYS | LI15 | 41 | Kelly, Richard S | TBR 15-4 faulting on multiple OC faults, took off beam and turned modulator off. HVOC faults. | 152 | HW Problem |
| 184944 | AMRF | Scheduled | Scheduled | 1 | LINAC MIDDLE GALLERY | SUBBOOSTER | SBST | LI11 | 1 | Kelly, Richard S | LI11 SBST intermittently bad phase readback (currently at -10000). | 101 | HW Problem |
| 157611 | PEM | Scheduled | Scheduled | 4 | LINAC MIDDLE GALLERY | KLYSTRON / MODULATOR | - | - | - | Stiles, Paul J. | FACET leaking T20: Annual inspection.
12-8 144196
13-4 150130
15-2 144200
15-6 144355
18-7 1444 | 1573 | HW Problem |
| 171218 | PEM | Downtime | Scheduled | 8 | LINAC MIDDLE GALLERY | KLYSTRON / MODULATOR | - | - | - | Chen, Xupeng | FACET: Modulator inspection | 830 | HW Problem |
| 176685 | PEM | Scheduled | Scheduled | 1 | LINAC MIDDLE GALLERY | DC MAGNETS | - | LI10 | - | Chen, Xupeng | Sector 10: Validate the ELP for Sector 10 focus coil PSs | 533 | HW Problem |
| 177535 | PEM | Scheduled | Scheduled | 6 | LINAC MIDDLE GALLERY | DC MAGNETS | - | - | - | Herr, Chang P | Preventive maintenance of EMHP PS | 499 | HW Preventative Maintenance |
| 182281 | PEM | Scheduled | Scheduled | 7 | LINAC MIDDLE GALLERY | KLYSTRON / MODULATOR | KLYS | LI19 | 21 | Chen, Xupeng | 19-2 Modulator Linac Middle PPS IAT preparation and testing. | 249 | HW Problem |
| 182509 | PEM | Scheduled | Scheduled | 1 | LINAC MIDDLE GALLERY | KLYSTRON / MODULATOR | - | - | - | Chen, Xupeng | B002: FACET & LCLS survey the number of oil-filled T20 in operation (PCB and non-PCB). Survey the s | 236 | HW Problem |
| 183959 | PEM | Scheduled | Scheduled | 2 | LINAC MIDDLE GALLERY | KLYSTRON / MODULATOR | KLYS | LI19 | 21 | Chen, Xupeng | 19-2 MOD / FLK (failed PPS Contactor) | 160 | HW Problem |
| 185043 | PEM | Scheduled | Scheduled | 1 | LINAC MIDDLE GALLERY | KLYSTRON / MODULATOR | KLYS | LI16 | 71 | Chen, Xupeng | Klystron 16-7 modulatior (MOD) fault won't reset remotely | 96 | HW Problem |
| 185111 | PEM | Scheduled | Scheduled | 1 | LINAC MIDDLE GALLERY | KLYSTRON / MODULATOR | KLYS | LI16 | 31 | Chen, Xupeng | 16-3 HVR. | 91 | HW Problem |
| 185139 | PEM | Scheduled | Scheduled | 1 | LINAC MIDDLE GALLERY | DC MAGNETS | - | - | - | Herr, Chang P | LI15 QUAD 401 has an erratic history. | 90 | HW Problem |
| 185140 | PEM | Scheduled | Scheduled | 1 | LINAC MIDDLE GALLERY | DC MAGNETS | - | - | - | Herr, Chang P | LI16 QUAD 201 has an erratic history. | 90 | HW Problem |
| 185648 | PEM | Downtime | Scheduled | 1 | LINAC MIDDLE GALLERY | KLYSTRON / MODULATOR | - | - | - | Chen, Xupeng | FACET: Validate the new version of ELP because of 11-4 120VAC Breaker location change and the new di | 29 | HW Problem |
| 185651 | PEM | Downtime | Scheduled | 1 | LINAC MIDDLE GALLERY | KLYSTRON / MODULATOR | - | - | - | Chen, Xupeng | LCLS: Validate the new ELP for AIP Modulator because of 11-1 and 11-2 modulator 120VAC breaker locat | 29 | HW Problem |
| 186031 | PEM | Scheduled | In Progress | 0 | LINAC MIDDLE GALLERY | DC MAGNETS | LGPS | LI14 | 1 | Herr, Chang P | LI14 large power supply BACT drifting out of tolerance | 13 | HW Problem |
| 186215 | PEM | Scheduled | Scheduled | 1 | LINAC MIDDLE GALLERY | DC MAGNETS | XCOR | LI16 | 202 | Herr, Chang P | LI16 XCOR 202 is out of tolerance. | 4 | HW Problem |
| 186216 | PEM | Scheduled | Scheduled | 1 | LINAC MIDDLE GALLERY | DC MAGNETS | - | - | - | Herr, Chang P | LI16 XCOR 602 is out of tolerance. | 4 | HW Problem |
| 186225 | PEM | Scheduled | In Progress | 0 | LINAC MIDDLE GALLERY | KLYSTRON / MODULATOR | - | - | - | Chen, Xupeng | Request PEM support for Linac Middle sectors 10-20 modulator turn on for PPS testing. We are schedul | 4 | HW Problem |
| 186239 | PEM | Scheduled | Scheduled | 1 | LINAC MIDDLE GALLERY | DC MAGNETS | - | - | - | Herr, Chang P | Replace fan filter on EPSC Control module in the Linac Sector 10 to 19. | 1 | HW Preventative Maintenance |
| 186272 | PEM | Scheduled | In Progress | 0 | LINAC MIDDLE GALLERY | VACUUM | KLYS | LI11 | 61 | Chen, Xupeng | 11-6: WGV fault. | 0 | HW Problem |
| 186276 | PEM | Scheduled | In Progress | 0 | LINAC MIDDLE GALLERY | VACUUM | KLYS | LI11 | 41 | Chen, Xupeng | 11-4: WGV fault. | 0 | HW Problem |
| 157465 | AMRF | Scheduled | Scheduled | 1 | LINAC WEST (S1-9) | RF | - | - | - | Benwell, Andy L | Downtime- CM26 cavity 2 piezo stack A shows no capacitance | 1580 | HW Problem |
| 158150 | AMRF | Scheduled | Scheduled | 1 | LINAC WEST (S1-9) | SRF | - | - | - | Benwell, Andy L | Downtime- SRF 3.9 GHz systems: need to determine appropriate range for detune gain with-RF pie | 1545 | HW Problem |
| 159755 | AMRF | Scheduled | Scheduled | 4 | LINAC WEST (S1-9) | RF | - | - | - | Benwell, Andy L | Downtime- LCLS-II Gun LLRF - upgrade installation CATER | 1457 | HW Install/Removal/Modify |
| 166122 | AMRF | Scheduled | Scheduled | 1 | LINAC WEST (S1-9) | SRF | - | - | - | Benwell, Andy L | Downtime- 33-2, 33-3, 35-5, 35-6 HOM clamp temperature spikes causing USH DSH faults | 1084 | HW Problem |
| 170265 | AMRF | Scheduled | Scheduled | 1 | LINAC WEST (S1-9) | SRF | - | - | - | Benwell, Andy L | Downtime- CM28-1 hit limit switch B while tuning to resonance.
As of 3/5/25 still active. | 873 | HW Problem |
| 170893 | AMRF | Scheduled | Scheduled | 1 | LINAC WEST (S1-9) | RF | - | - | - | Benwell, Andy L | These SC Linac RF BSA systems show frozen/invalid data | 841 | HW Problem |
| 175355 | AMRF | Scheduled | Scheduled | 2 | LINAC WEST (S1-9) | SRF | - | - | - | Benwell, Andy L | Downtime CM21 cavity 3 STT on stepper 3. Temperature. | 594 | HW Problem |
| 175476 | AMRF | Scheduled | Scheduled | 5 | LINAC WEST (S1-9) | SRF | - | - | - | Benwell, Andy L | Long Downtime: CM33-3 Issues with Stepper Tuner | 587 | HW Problem |
| 175924 | AMRF | Scheduled | Scheduled | 4 | LINAC WEST (S1-9) | SRF | - | - | - | Benwell, Andy L | CM33-5, 6, 7, and 8 cavity detune is reacting erratically to tuner movements. | 567 | HW Problem |
| 176595 | AMRF | Scheduled | In Progress | 1 | LINAC WEST (S1-9) | SRF | - | - | - | Benwell, Andy L | Downtime- CM15-5 coupler temperature 2 readout instantly jumped to 508.15 K. | 538 | HW Problem |
| 177036 | AMRF | Scheduled | Scheduled | 2 | LINAC WEST (S1-9) | RF | - | - | - | Benwell, Andy L | Some SC RF BSA quantities are not showing up in the EPICS control screens | 522 | HW Problem |
| 177171 | AMRF | Scheduled | In Progress | 1 | LINAC WEST (S1-9) | TEMPERATURE | - | - | - | Benwell, Andy L | Downtime- CM14-6 coupler temperature 2 sensor faulted low at 33.13K | 516 | HW Problem |
| 179253 | AMRF | Scheduled | Scheduled | 4 | LINAC WEST (S1-9) | RF | - | - | - | Sikora, John P | HOM Chassis Test at CM01 | 400 | Project/ Enhancement / Request |
| 179300 | AMRF | Scheduled | Scheduled | 1 | LINAC WEST (S1-9) | RF | - | - | - | Kelly, Richard S | CM 36 and above.
Lock out SSAs after installing with an admin lock until powering up. | 399 | HW Install/Removal/Modify |
| 180871 | AMRF | Scheduled | Scheduled | 1 | LINAC WEST (S1-9) | RF | - | - | - | Kelly, Richard S | H2-3 still has a large mismatch between forward and reverse power after PAMM work. | 326 | HW Problem |
| 181046 | AMRF | Scheduled | In Progress | 1 | LINAC WEST (S1-9) | SRF | - | - | - | - | LDT CM25-3 coupler temperature 2 (bottom sensor) interlock is faulted. | 319 | HW Problem |
| 181148 | AMRF | Scheduled | Scheduled | 1 | LINAC WEST (S1-9) | TEMPERATURE | - | - | - | - | CM09-5 coupler temperature 1 sensor faulted and showing non-physical temperature (33.15 K). | 314 | HW Problem |
| 181185 | AMRF | Scheduled | Scheduled | 1 | LINAC WEST (S1-9) | SRF | - | - | - | - | CM27-3 faulted on STT. Set offline. | 313 | HW Problem |
| 181278 | AMRF | Scheduled | Scheduled | 1 | LINAC WEST (S1-9) | RF | - | - | - | Benwell, Andy L | For LLRF system measurements, temporarily connect signal cables from CM34 RF chassis to | 308 | HW Install/Removal/Modify |
| 181313 | AMRF | Scheduled | Scheduled | 1 | LINAC WEST (S1-9) | SRF | - | - | - | - | CMH2-2,6.
11/28 owl shift. Two instances of SSA forward power faults on CMH2-2,6. On one | 305 | HW Problem |
| 181323 | AMRF | Scheduled | Scheduled | 1 | LINAC WEST (S1-9) | SRF | - | - | - | - | CM21-2 faulted on STT (Stepper temperature) fault.
See elog entry for archive image. It looks lik | 305 | HW Problem |
| 181525 | AMRF | Scheduled | Scheduled | 1 | LINAC WEST (S1-9) | SRF | - | - | - | Benwell, Andy L | CM34-7 and CM34-8 Local Oscillator Level faults | 295 | HW Problem |
| 183479 | AMRF | Scheduled | Scheduled | 4 | LINAC WEST (S1-9) | RF | - | - | - | Taylor, Zack M | CM34 LLRF prep for welding | 186 | HW Install/Removal/Modify |
| 184231 | AMRF | Scheduled | Scheduled | 3 | LINAC WEST (S1-9) | RF | - | - | - | Olszewski, Joseph | L2KG01-SSA9 leaking from Ferrite isolator hose; Pen 1-15 | 144 | HW Problem |
| 184366 | AMRF | Downtime | RevToClose | 1 | LINAC WEST (S1-9) | RF | - | - | - | Ludlow, Nick M | Installation of rigid coaxial line for LCLS-II-HE Phase reference line. The PPS door between sector | 134 | HW Install/Removal/Modify |
| 185339 | AMRF | Scheduled | Scheduled | 11 | LINAC WEST (S1-9) | RF | - | - | - | Chen, Jing X | LCLS-II-HE Sector 9 LLRF Equipment energization and configuration | 76 | Project/ Enhancement / Request |
| 185389 | AMRF | Scheduled | Scheduled | 8 | LINAC WEST (S1-9) | RF | - | - | - | Chen, Jing X | S7 ~ S10 HE LLRF installation and checkout | 70 | Project/ Enhancement / Request |
| 185562 | AMRF | Scheduled | RevToClose | 1 | LINAC WEST (S1-9) | RF | - | - | - | Chen, Jing X | Longhaul LLRF cable retermination punch list for S9 | 41 | HW Install/Removal/Modify |
| 185776 | AMRF | Downtime | Scheduled | 3 | LINAC WEST (S1-9) | RF | - | - | - | Ludlow, Nick M | Checkout of LCLS-II-HE Phase Reference Line | 21 | HW Install/Removal/Modify |
| 186172 | AMRF | Scheduled | Scheduled | 2 | LINAC WEST (S1-9) | RF | - | - | - | Chen, Jing X | 7/8" LO connection between L3 and L4 | 6 | Project/ Enhancement / Request |
| 180290 | PE | Scheduled | In Progress | 0 | LINAC WEST (S1-9) | DC MAGNETS | - | - | - | Aderhold, Sebastian C. | QCM30 and XCOR (3085) tripped on QP switch 1 and 2, reset interlocks and degaussed fine (-0.2hrs) | 353 | HW Problem |
| 178043 | PEM | Downtime | Scheduled | 2 | LINAC WEST (S1-9) | DC MAGNETS | - | - | - | Lam, Briant K. | CM magnet quench faults (false). Troubleshoot inside CM. | 476 | HW Problem |
| 181446 | PEM | Downtime | Scheduled | 6 | LINAC WEST (S1-9) | DC MAGNETS | - | - | - | Lam, Briant K. | LOTO and air-gap LCLS-II EXT and DOGLEG magnets for removal | 299 | HW Install/Removal/Modify |
| 183843 | PEM | Downtime | Scheduled | 24 | LINAC WEST (S1-9) | DC MAGNETS | - | - | - | Lam, Briant K. | LCLS-II-HE Cryomodule Magnet Power Supply Checkout | 167 | HW Install/Removal/Modify |
| 183847 | PEM | Downtime | Scheduled | 2 | LINAC WEST (S1-9) | DC MAGNETS | - | - | - | Herr, Chang P | LOTO and air-gap CM34 magnet for CM replacement | 167 | HW Install/Removal/Modify |
| 185152 | PEM | Scheduled | Scheduled | 1 | LINAC WEST (S1-9) | DC MAGNETS | - | - | - | Herr, Chang P | Suspect 60Hz jitter from BRB2 BEND:DOG:240 | 89 | HW Problem |
| 185318 | PEM | Scheduled | Scheduled | 2 | LINAC WEST (S1-9) | DC MAGNETS | - | - | - | Herr, Chang P | LOTO/ZVV and air-gap CM35 DC magnets cable for CM replacement. | 77 | HW Install/Removal/Modify |
| 185362 | PEM | Scheduled | Scheduled | 2 | LINAC WEST (S1-9) | DC MAGNETS | - | - | - | Herr, Chang P | Open breakers on power supplies in LCLS-II | 75 | HW Preventative Maintenance |
| 180640 | AMRF | Scheduled | Scheduled | 3 | LINAC WEST GALLERY | RF | - | - | - | - | CMs 1 - 35 Power outage tuner patch panel installation | 337 | HW Install/Removal/Modify |
| 180744 | AMRF | Scheduled | Scheduled | 2 | LINAC WEST GALLERY | RF | - | - | - | Nguyen, Binh T | CM25-6 SSA putting out less than 1kW max | 333 | HW Problem |
| 181608 | AMRF | Downtime | Scheduled | 1 | LINAC WEST GALLERY | RF | - | - | - | Kelly, Richard S | SSA CM35-3 Heat exchanger fan 1 reads 0 RPM. | 291 | HW Problem |
| 181609 | AMRF | Scheduled | Scheduled | 1 | LINAC WEST GALLERY | RF | - | - | - | Wack, Bob J | CM35-4 SSA Heat exchanger fan 3 reads 0 RPM. | 291 | HW Problem |
| 184439 | AMRF | Scheduled | Scheduled | 2 | LINAC WEST GALLERY | RF | - | - | - | Kelly, Richard S | Turn off a set LLRF racks in LCLS-SC. | 130 | HW Install/Removal/Modify |
| 184988 | AMRF | Scheduled | Scheduled | 6 | LINAC WEST GALLERY | RF | - | - | - | Kelly, Richard S | Temporary LO Distribution Source and Amplifier for HE LLRF Racks | 98 | HW Install/Removal/Modify |
| 185087 | AMRF | Scheduled | Scheduled | 2 | LINAC WEST GALLERY | RF | - | - | - | Benwell, Andy L | LCLS2 PRL feedback loop stability diagnostics/improvements | 92 | HW Install/Removal/Modify |
| 185686 | AMRF | Scheduled | RevToClose | 1 | LINAC WEST GALLERY | RF | - | - | - | Chen, Jing X | Loose K2 QSFP cage on Resonance Control Chassis in rack L2KG07-62 | 27 | HW Problem |
| 185724 | AMRF | Scheduled | RevToClose | 1 | LINAC WEST GALLERY | RF | - | - | - | Chen, Jing X | Replace cavity 3 piezo driver board for LLRF resonance control chassis,
CM59 LLRFA (L2KG10-17) | 25 | HW Problem |
| 185727 | AMRF | Scheduled | Scheduled | 1 | LINAC WEST GALLERY | RF | - | - | - | Chen, Jing X | TDR sector 7~10 LLRF drive cables | 25 | HW Preventative Maintenance |
| 185903 | AMRF | Scheduled | Scheduled | 1 | LINAC WEST GALLERY | RF | - | - | - | Nguyen, Binh T | Need to change out a bad power strip in Rack CM 40 Rack B. | 18 | HW Install/Removal/Modify |
| 171622 | PEM | Scheduled | Scheduled | 3 | LINAC WEST GALLERY | NETWORK INFRASTRUCTURE | - | - | - | Hugyik, John | Install rendundant rack mounted A/C unit in LINAC | 802 | HW Install/Removal/Modify |
| 181493 | PEM | Scheduled | In Progress | 0 | LINAC WEST GALLERY | DC MAGNETS | - | - | - | Herr, Chang P | QCM27 and XCM27 tripped; the quad tripped on quench protection sw #1, and the xcor tripped on both q | 297 | HW Problem |
| 171166 | PEM | Scheduled | Scheduled | 7 | LTU | DC MAGNETS | - | - | - | Herr, Chang P | LCLS: Replace two Magnet VME Crates in LTUH with EMCOR controllers | 832 | Project/ Enhancement / Request |
| 185918 | PEM | Scheduled | In Progress | 0 | LTU | DC MAGNETS | - | - | - | Herr, Chang P | LTUH first XCORs and YCORs (YCOR:LTUH:105 through XCOR:LTUH:348) are on but are OOT and not trimming | 18 | HW Problem |
| 185926 | PEM | Scheduled | Scheduled | 1 | LTU | DC MAGNETS | - | - | - | Herr, Chang P | YCVM1 (YCOR:LTUH:105, MCOR:LTUH:104) not trimming | 18 | HW Problem |
| 185989 | PEM | Scheduled | In Progress | 0 | LTU | DC MAGNETS | - | - | - | Herr, Chang P | YCOR:LTUH:133 is ignoring trim commands, regulating poorly | 15 | HW Problem |
| 186241 | PEM | Scheduled | Scheduled | 1 | LTU | DC MAGNETS | - | - | - | Herr, Chang P | Replace fan filter on EPSC Control module in B005. | 1 | HW Preventative Maintenance |
| 184011 | AMRF | Scheduled | Scheduled | 1 | UND | KLYSTRON / MODULATOR | - | - | - | Kelly, Richard S | XTCAVB on the soft line is tripping on RE faults quickly and sporadically at 35 MV. | 156 | HW Problem |
| 177685 | PEM | Downtime | Scheduled | 4 | UND | DC MAGNETS | - | - | - | Lam, Briant K. | Delta 2 Undulator: Power supply installation for interspace quad at cell 48 on SXR | 494 | HW Install/Removal/Modify |