JGWT 1605692 Commissioning Procedure for b KAGRA Phase
JGW-T 1605692 Commissioning Procedure for b. KAGRA Phase 1 (2017. 9 -2018. 3) Yuta Michimura Department of Physics, University of Tokyo see, also, JGW-T 1605595 for interferometer design and commissioning schedule
TRY EYT Vacuum Layout GVbrty φ100 EYC • Legend chamber IFI EYA duct GVetmy φ100 bellows GVitmy φ100 IYA gate valve optical table IYC POP PR 2 BS IXC GVbsx φ150 SR 2 POP SR 3 PR 3 SRM POS REFL IMM AS IFI IXA EXA GVitmx φ100 GVetmx φ100 EXC EXT TRX GVbsy φ150 GVbrtx φ100 2
TRY Expected Situation EYT 8. 31 EYA EYC EYT BRT installation (7. 11 -10. 2) • PSL & IMC ready, beam reached PRM (by 8. 31) • BS (by 4. 13) and PRs (by 7. 6) ready • SR 2 also ready (by 7. 31) IYA Yarm evacuated PR 3 -2 not connected PR 3 BS AS bellows around BS not connected IXC IXA EXC EXT POP POS REFL PR 2 SR 2 PRM SR 3 IMM SRM IFI TRX IYC GV closed Xarm evacuated bellows between SR 2 and SR 3 not connected SR 3 installation (7. 14 -12. 19) 3
TRY Connect PR 3 -2 Duct EYT 9. 1 -9. 8 • connect PR 3 -2 duct to start initial alignment • connect it after the start of ETMY CRYp installation IYA EYC EYT BRT installation (7. 11 -10. 2) ETMY CRYp installation starts (9. 1 -10. 31) PR 2 BS IXC IXA EXC EXT SR 2 POP SR 3 PR 3 SRM POS REFL IMM AS IFI TRX IYC connect PR 3 -2 duct SR 3 installation (7. 14 -12. 19) 4
TRY EYT 9. 11 -9. 15 • beam spot on PR 3 has to be off the center by -5 mm in Y, since there’s no ITM wedge PR 2 BS IXC IXA EXC EXT SR 2 POP SR 3 PR 3 steer PR 2 to -5 mm off in Y from the center of PR 3 SRM POS REFL IMM AS IFI TRX IYC steer IMMT 2 to center the beam on PRM and PR 2 IYA EYC EYT BRT installation (7. 11 -10. 2) ETMY CRYp installation (9. 1 -10. 31) Alignment from IMMT to PR 3 SR 3 installation (7. 14 -12. 19) 5
TRY EYT 9. 18 -9. 22 • need to calculate the beam position on GV windows EYA EYC EYT BRT installation (7. 11 -10. 2) ETMY CRYp installation (9. 1 -10. 31) Alignment from PR 3 to Xend IYA Thorlabs PDA 100 A (DC PD) steer PR 3 to center the beam on BS and reach EXA BS IXC IXA EXC EXT POP SR 2 REFL PR 2 SR 3 PR 3 SRM POS IMM AS IFI TRX IYC ? ? mm of the center of GVitmx window Thorlabs PDA 100 A (DC PD) SR 3 installation (7. 14 -12. 19) 6
TRY EYT 9. 25 -9. 29 • need to calculate the beam position on GV windows EYA EYC EYT BRT installation (7. 11 -10. 2) ETMY CRYp installation (9. 1 -10. 31) Alignment from BS to Yend ? ? mm of the center of GVitmy window PR 3 BS AS steer BS to reach EYA IXC IXA EXC EXT POP POS REFL PR 2 SR 2 PRM SR 3 IMM SRM IFI TRX IYC IYA Thorlabs PDA 100 A (DC PD) +5. 6 mm off the center in Y of EXT BRT (although the beam reach EXT, BRT is not ready yet at this point) SR 3 installation (7. 14 -12. 19) 7
TRY Beam Collimation EYT 10. 2 -10. 27 EYA EYC EYT BRT installation done ETMY CRYp installation (9. 1 -10. 31) IYA EYA NAB installation starts (10. 3 -11. 27) • measure the beam profile at PR 3, PR 2 and IXA (or IYA) • adjust PR 2 -PR 3 lengths if beam looks bad (we won’t try PRMI at first, so we don’t have to move PR 2/3 if the beam is not terrible) PR 3 PR 2 BS IXC IXA EXC EXT TRX PRM SR 2 POP POS beam profiling (adjust PR 2 -3 length) SR 3 beam profiling SRM REFL IMM AS IFI IYC block so that beam don’t reach Yend SR 3 installation (7. 14 -12. 19) 8
TRY Align ETMY EYT 11. 1 -11. 7 • align ETMY right after ETMY CRYp installation completion • also align TMSY EYA EYC ETMY CRYp installation done align ETMY so that the beam reach REFL EYA NAB installation (10. 3 -11. 27) align TMSY BRT in-vac (ETMY transmission 5 -10 ppm; maybe too dim to align BRT; use green? ? ) SRM installation starts (10. 31 -3. 2) IXC IXA EXC EXT POP SR 2 Thorlabs PDA 100 A (DC PD) BS SR 3 REFL PR 2 SRM PR 3 POS PRM AS IMM IFI TRX IYC IYA slit at EYA for ETMY alignment block so that beam don’t reach Xend block so that beam don’t reach SR 3 installation (7. 14 -12. 19) 9
TRY Align Aux Optics EYA EYC EYT 11. 8 -11. 14 • align REFL, POP, TRY align TRY table optics (maybe too dim) IYA EYA NAB installation (10. 3 -11. 27) BS SRM align REFL table optics SRM installation (10. 31 -3. 2) IXC IXA EXC EXT POP SR 2 REFL PR 2 SR 3 POS PRM AS IMM IFI TRX IYC align POP in-vac optics block so that beam don’t reach Xend block so that beam don’t reach SR 3 installation (7. 14 -12. 19) 10
TRY prepare for EY evacuation Prepare for EY Evacuation • preparation works before evacuation • EYA NAB won’t be suspended if no time; EY evacuation is first priority EYA EYC EYT 11. 15 -11. 21 BS SRM align POP table optics SRM installation (10. 31 -3. 2) IXC IXA EXC EXT POP SR 2 REFL PR 2 SR 3 POS PRM AS IMM IFI TRX IYC IYA EYA NAB installation (10. 3 -11. 27) EY evacuation is priority block so that beam don’t reach Xend block so that beam don’t reach SR 3 installation (7. 14 -12. 19) 11
TRY EY Evacuation EYC EYT 11. 22 -12. 8 EYA evacuate EYA+EYC • monitor beam at REFL, POP, TRY during evacuation • (EXT BRT alignment without ETMX; +5. 6 mm off the center in Y at EXT) IYC IYA EYA NAB installation done (10. 3 -11. 27) SRM installation (10. 31 -3. 2) IXC IXA EXC EXT TRX BS SR 2 POP SR 3 REFL PR 2 SRM PR 3 POS PRM AS IMM IFI EXT BRT installation starts (11. 28 -2. 19) block so that beam don’t reach Xend block so that beam don’t reach SR 3 installation (7. 14 -12. 19) 12
TRY EY Cooling Starts EYC EYT 12. 8 • monitor beam at REFL, POP, TRY, TRX during cool down EYA cool down ETMY IYC IYA keep GVetmy closed (we can open this if we have spare time) SRM installation (10. 31 -3. 2) IXC IXA EXC EXT TRX BS SR 2 POP SR 3 REFL PR 2 SRM PR 3 POS PRM AS IMM IFI EXT BRT installation (11. 28 -2. 19) block so that beam don’t reach Xend block so that beam don’t reach SR 3 installation (7. 14 -12. 19) 13
TRY EYC EYT 12. 20 -26 • align SR 3 to center the beam on SR 3 (CHECK: how much offset? ) • steer SR 3 to center the beam on SR 2 • measure beam profile at SR 2 and SR 3 • AS for Phase 1 is a reflected beam from SR 2, extracted at SR 3 chamber IYC IYA EYA cool down ETMY Alignment from BS to AS IXA EXC EXT TRX IXC SR 2 POP SR 3, SR 2 alignment beam profiling SRM installation (10. 31 -3. 2) BS SR 3 REFL PR 2 SRM PR 3 POS PRM AS IMM IFI EXT BRT installation (11. 28 -2. 19) block so that beam don’t reach Xend SR 3 installation done 14
TRY ETMX Installation EYA cool down ETMY IYA open GVetmy? IYC connect bellows? • during ETMX CRYp installation, initial alignment team have spare time • we can open GVetmy if we have time • we can also connect bellows in central area (but we might have to remove again for PR 2 -3 length adjustment for PRMI mode stabilization, after March) • note that central area cannot be evacuated before SRM completion (3. 2) since no GV between BS and SRM installation (10. 31 -3. 2) IXC IXA EXC EXT POP SR 2 align AS table optics (1. 15 -1. 19) BS SR 3 REFL PR 2 SRM PR 3 POS PRM AS IMM IFI EXT BRT installation (11. 28 -2. 19) TRX EYC EYT 1. 8 -2. 2 block so that beam don’t reach Xend align AS in-vac optics (1. 8 -1. 12) ETMX CRYp installation starts (1. 8 -2. 2) 15
TRY Align ETMX EYC EYT 2. 5 -2. 9 IYC IYA EYA cool down ETMY • align ETMX right after ETMX CRYp installation completion • also, fine align TMSX and TRX IXA EXC EXT POP AS SRM installation (10. 31 -3. 2) IXC TRX BS POS REFL PR 2 SR 2 PR 3 SR 3 PRM SRM IMM IFI EXT BRT installation (11. 28 -2. 19) slit at EXA for ETMX alignment ETMX CRYp installation done align ETMX so that the beam reach REFL 16
TRY Michelson LSC EYT 2. 12 -2. 16 • lock Michelson with AS_Q IYC IYA EYA cool down ETMY IMM PR 3 BS IXC IXA EXC EXT SR 2 SR 3 POP POS REFL PR 2 AS IFI EXT BRT installation (11. 28 -2. 19) TRX PRM misaligned SRM installation (10. 31 -3. 2) SRM lock Michelson 17
TRY EYC EYT 2. 19 -2. 23 • preparation works before vacuation • EXA NAB won’t be suspended if no time; EX evacuation is first priority IYA EYA cool down ETMY Prepare for EX Evacuation PRM PR 3 BS IXC IXA EXC EXT POP POS REFL PR 2 SR 2 IMM IFI TRX IYC EXA NAB installation starts (2. 20 -2. 22) EX evacuation is priority EXT BRT installation done SRM installation (10. 31 -3. 2) SR 3 SRM AS prepare for EX evacuation align TMSX BRT in-vac (2. 20 -2. 26) 18
TRY EX Evacuation EYC EYT 2. 23 -3. 2 IYA EYA cool down ETMY • monitor beam at REFL, POP, TRY, AS during evacuation • TRX will be available afterwards BS AS SRM installation done (3. 2) IXC IXA EXC EXT POP POS REFL PR 2 SR 2 PR 3 SR 3 PRM SRM IMM IFI TRX IYC alignment of TMSX BRT and TRX table optics (maybe too dim) evacuate EXA+EXC keep GVetmx closed align TRX table optics (we can open this if (2. 27 -3. 5) 19 we have spare time)
TRY EX Cooling, Test Run EYC EYT 3. 2 -3. 31 PRM PR 3 PR 2 BS IXC IXA EXC EXT POP POS REFL IMM SR 2 IFI TRX IYC IYA EYA cool down ETMY • monitor beam at REFL, POP, TRY, TRX, AS during cool down • keep Michelson locked during cool down until 3. 31 → Cryogenic Michelson Test Run (b. KAGRA Phase 1 complete) SR 3 AS cool down ETMX SRM keep Michelson locked align TRX table optics (2. 27 -3. 5) 20
TRY EYC EYA cool down ETMY PR 2 BS IXC IXA EXC EXT SR 2 POP POS REFL PR 3 TRX PRM PR 2 -PR 3 length adjust PRMI alignment, locking connect remaining bellows/ducts evacuate central area open GVs (GVsrm should be closed) central area evacuation IYC PRM alignment to make PRC IMM • • • IYA PR 2 -PR 3 length adjust (Michelson re-alignment needed) SRM lock PRMI with ASC SR 3 cool down ETMX AS IFI PRMI EYT Apr-Jun GVsrm: closed 21
To Be Discussed • TMS BRT installation schedule and other AOS related issues [Akutsu, Uchiyama, Michimura] - considering wedge, ETMs should be installed before BRT alignment, but transmitted beam from ETM is too dim (~ 0. 1 u. W); use green? - when to install narrow-angle baffles? • Wide-angle baffles (for Pcal and main beam) compatible with ETM HR camera? [Akutsu, Kokeyama, Inoue] • Confirm beam spot positions at GVs [Michimura, Aso] 22
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