Random Comments

ACR ops do hot & cold turn-on checklists that are made/approved by AOSD & area physicist.

Link to a Turn-on Checklist for Linac West for ACR ops made by Chris Zimmer. Here's the one for the BSY.

Existing Device Check-out Procedures

Summary of JLab Cavity & CM checks at bottom.

Device Checkout Tool hierarchy: Machine (LCLS-II), System (dumps, fac, instru, laser, mps, mags, pps, rf, timing, vac), Subsystem(bend, coll, air), Device (B11, C24), Shop (PEM), Procedure

Types of Devices

SRF Group Checklists (big picture)

Cryomodule - SRF

• Pre-cooldown
  • Bob's pre-cooldown checklist
    • did this include checking cables to the vac pumps and gauges on the coupler line? Should be two gauges & one vacp/CM 
    • Also some pumps on insul vac at Big Bellows
    • (spreadsheet of vac elements from Shweta, L0B-SPS: S0-S30 Vacuum Names_Sherwin V2.1.xlsx )
• Pre-turn-on
  • Equivalent to pre-cooldown, but expect 2K
    • all instrumentation - temps, pres, LL, cryo valves, coupler/beamline/insul vacuum
    • Can we assume RF, BPM, and magnet cables still connected?

Cavity - SRF

• Pre-turn-on (not covered in CM pre-turn-on)
  • WG pressure
  • LLRF system, SSA looks ready to go
  • Test LLRF interlocks?
• Commissioning
  • Procedure we've been working on

Magnet - SRF

• Pre-turn-on
  • Cables connected
  • EPICS database/displays look good (whatever that means)
  • Power supplies have power (rack breakers closed)
  • Power supply interlocks clear
• Commissioning
  • Steps in Cavity Commissioning procedure (clear interlocks, turn on, degauss quad, trim all to 8.5V, wait a while, turn off)

BPM - SRF

• Pre-turn-on
  • Cables connected
  • EPICS database looks good (whatever that means)
  • Calibrate with NWA - enter numbers in database
• Commission with beam
  • Timing
  • Iron TMIT

Warm SCL Checklists (HTR-Spreaders)

From Tonee Pre-Beam Tunnel Check List for LCLS2 Commissioning

Things of interest: MAD deck dump with Z-locations and some devices get extra checks.

Tonee et al was yo-yoing and noted distances between things and lengths to check Z-locations,

IMON checks: Z locaion, name-label visible on or near device, connected

Drift: length

XCOR/YCOR: z location, slac bar code, beam direction arrow ok, polarity ok, name-label visible, field responds to controls, dipole field, power connections tight and clear, power cables labeled for polarity

QUAD: z locn, slac bar code, beam direction arrow, unipolar QD/QF - polarity ok, name label visible, field responds to controls, power connections tight and clear, power cables labeled for polarity, water connected, supply and return labels correct, klixon is on return water line, thermal image recorded at full current (timestamp), max coil temp, any hot spots

BPM: z locn, slac bar code, rotation angle (circle 0 or 45), polarity color-coding ok, feed through end (circle US or DS), name-label visible

Decoder cartoon for 0 rot BPMS looking downstream, TDC CW are red, blue, yellow, green. For 45 rot, red starts NW

PCOLL: z locn, name-label, water connected, air connected, thermal sensor attached, thermal sensor readback, thermal image recorded (timestamp), ion chambers connected, ion chamber gas connected, ion chambers labeles

BTM: z location, name-label visible (she added gas?)

Stopper: z location, name-lable visible, water connected, air line connected, response to controls

RCOL: z locn, name label visible on or near device, left jaw moves in & out, right jaw too, water connected, thermal sensor attached, thermal sensor readback, thermal image recorded

She wrote in a bunch of vac devices by hand and notes HV connected

WIRE (see LTUH/LTUS file): z locn, beam direction arrow ok, rotation=?, installation orientation ok, name-label visible on or near device, wire travels in & out properly

BEND: z locn, slac bar code, beam direction arrow ok, positive vertical main polarity ok, name label visible, field responds to controls, dipole field, power connections tight and clear, water connected or no water, klixon is on return water line, thermal image recorded at full current, max coil temp, any hot spots, main power cables labeled for polarity, trim power cables labeled for polarity, trim polarity ok

From JLab (Thing - group)

Cavity - RF

• IF, LO levels
• cav comm & state op
• Interlock ops: arc detector, ir, WGV, BLV
• Klystron checks: filament PS, mod anode power supply, mod anode current, cathode current
• RF Operation (?
• Gradient Operation

Cavity - SRF

• He Pressure<.045atm, LL>88%
• vacuum: insul<1e-6T, BL<5e-9T, WGV<5e-8T
• Interlocks: successful test of arc detector, WGV, BLV
• CWWT checks (don't know)
• warm & cold window limits of 4V
• Make list of params for ops: QextFPC, GMES_prov (FF to convert llrf to MV/m), Emax, Emax limit, EmaxOP, FE onset, Q0 at EmaxOP

Cryomodules - Cryo

• Check Guard Alarm
• Alarms active & green:
  • CHL CAMAC, power failure, compressors, turbines, odh, main cold box, dewars, contamination, recovery, new purifiers
  • Linac: temp alarms, LLs, htrs
  • 2k cold box scn
  • diesel air compressor
  • Cryo IOCs
• Enclosure
  • Inspect Enclosure equip for condensation & icing: Transfer lines, U-tubes, helium relief stacks, CMs, other
  • All RT valves disconnected
  • NuPro Valves: guard vac vals open, 3atm vals closed
  • All unnecessary tools & equip removed from enclosure
• JT ValvesCEBAF CMs ready for ops
  • fully operational
  • sample times correct

Cryomodules - RF

• Check for proper operation:
  • MO driveline temp regulator
  • Multiple output power supply (PS)
  • +-12V, 5V PS
  • +-18V PS
  • Arc/IR PS
  • 2.5W amp PS
  • LCW flow interlock
  • WG air pressure interlock & ensure ready indicator for PSS
  • CPS lower interlock
  • CPS HV op & ensure off/safe on PSS

Cryomodules - SRF

• Confirm at 2K (He P<.045atm, LL>85%)
• Return stack Al Shield installed
• Ground cable connected
• Verify end can instrumentation cable connections
  • J2, J3, LL, 100T baratron, JT valve, RT valve
• Verify end can top hat instru connections
  • limit sw, heaters, temp diodes, window temp sensors, arc detector, stepper motor, field probe
• Verify vac cxns
  • BL IP, WG IP at top hat, WGIP each cavity, cold cathode gauge
  • Turbo pump: check UPS & correct operations
• Insul Vac check
  • Check archiver. If >1e-5T, check VGCC. If value not updating, contact someone in Instru Group

Cryomodules - SSG (Safety group)

• PSS
  • WG pressure system verified
  • Acceptance test complete 
  • Jumpers removed
  • Static cert complete
  • func cert complete
  • PSS locks removed
  • Verify docs on M Drive
• MPS
  • FSD card tested
  • RF fault trips proper FSD input
  • Mask/unmask RF FSD Cript working
  • RF mask icon shows on FSD overview screen
  • Verify docs on M Drive

Correctors - DC Power

• Short Checklist (SAD recovery, no major system upgrade)
  • PS ON
  • Tracks SETP and hysteresis cyclced
  • If not ok, troubleshoot & reiterate 
• Full Checklist (magnet removal, major sys upgrade)
  • Mechanical checksPolarity checks - link to doc
    • leads connected, torqued correctly, correctly labeled
  • Integration procedure link for 10A and 20A systems