JGWT 1605692 Commissioning Procedure for b KAGRA Phase

JGW-T 1605692 Commissioning Procedure for b. KAGRA Phase 1 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 IXA EXA GVitmx φ100 GVetmx φ100 EXC EXT GVbrtx φ100 POS GVbsx φ150 POP SR 2 PR 3 SR 3 PRM SRM REFL IMM AS IFI TRX GVbsy φ150 2

TRY Expected Situation EYT 8. 31 EYC • 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) EYA EYT BRT installed (6. 2 -8. 24) IYA Yarm evacuated PR 3 -2 not connected IMM PR 3 BS SR 3 SRM AS bellows around BS not connected IXC IXA EXC EXT POP SR 2 REFL PR 2 POS 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 EYC • connect PR 3 -2 duct to start initial alignment • connect it after the start of ETMY CRYp installation IYA ETMY CRYp installation starts (9. 1 -10. 31) connect PR 3 -2 duct PR 2 BS IXC IXA EXC EXT POS POP SR 2 PR 3 SR 3 PRM SRM REFL IMM AS IFI TRX IYC EXT BRT installation starts (9. 4 -11. 24) SR 3 installation (7. 14 -12. 19) 4

TRY Alignment from IMMT to PR 3 • beam spot on PR 3 has to be off the center by -5 mm in Y, since there’s no ITM wedge EYC EYT 9. 11 -9. 15 PR 2 BS IXC IXA EXC EXT POP AS steer PR 2 to -5 mm off in Y from the center of PR 3 POS PR 3 SR 2 PRM SR 3 REFL IMM SRM IFI TRX EXT BRT installation (9. 4 -11. 24) IYC steer IMMT 2 to center the beam on PRM and PR 2 IYA ETMY CRYp installation (9. 1 -10. 31) SR 3 installation (7. 14 -12. 19) 5

TRY Alignment from PR 3 to Xend • need to calculate the beam position on GV windows EYC EYT 9. 18 -9. 22 EYA ETMY CRYp installation (9. 1 -10. 31) IYA Thorlabs PDA 100 A (DC PD) ? ? mm of the center of GVitmx window steer PR 3 to center the beam on BS and reach EXA BS IXC IXA EXC EXT POP POS REFL PR 2 SR 2 PR 3 SR 3 PRM SRM IMM AS IFI TRX IYC EXT BRT installation (9. 4 -11. 24) Thorlabs PDA 100 A (DC PD) SR 3 installation (7. 14 -12. 19) 6

TRY Alignment from BS to Yend EYT 9. 25 -9. 29 EYC • need to calculate the beam position on GV windows EYA ETMY CRYp installation (9. 1 -10. 31) Thorlabs PDA 100 A (DC PD) IYA ? ? mm of the center of GVitmy window IMM PR 3 BS SR 3 SRM AS steer BS to reach EYA IXC IXA EXC EXT POP SR 2 REFL PR 2 POS IFI TRX IYC EXT BRT installation (9. 4 -11. 24) +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 EYC • 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) EYA ETMY CRYp installation (9. 1 -10. 31) IYA block so that beam don’t reach EYC PRM PR 3 PR 2 BS IXC IXA EXC EXT POS SR 2 POP beam profiling (adjust PR 2 -3 length) block so that beam don’t reach EXT SR 3 beam profiling SRM REFL IMM AS IFI TRX IYC EXT BRT installation (9. 4 -11. 24) SR 3 installation (7. 14 -12. 19) 8

TRY Align ETMY EYT 11. 1 -11. 7 EYC • align ETMY right after ETMY CRYp installation completion • also align TMSY EYA ETMY CRYp installation done align ETMY so that the beam reach REFL align TMSY BRT in-vac (ETMY transmission 5 -10 ppm; maybe too dim to align BRT; use green? ? ) IYA slit at EYA for ETMY alignment PRM PR 3 BS IXA EXC EXT block so that beam don’t reach EXT SR 3 SRM installation starts (10. 31 -3. 2) AS Thorlabs PDA 100 A (DC PD) IXC POP SR 2 REFL PR 2 POS IMM IFI TRX IYC EXT BRT installation (9. 4 -11. 24) block so that beam don’t reach SR 3 installation (7. 14 -12. 19) 9

TRY Align Aux Optics EYT 11. 8 -11. 14 EYC • align REFL, POP, TRY IYA EYA align TRY table optics (maybe too dim) align POP in-vac optics PRM PR 3 BS IXA EXC EXT block so that beam don’t reach EXT SR 3 SRM AS align REFL table optics SRM installation (10. 31 -3. 2) IXC POP SR 2 REFL PR 2 POS IMM IFI TRX IYC EXT BRT installation (9. 4 -11. 24) block so that beam don’t reach SR 3 installation (7. 14 -12. 19) 10

TRY Prepare for EY Evacuation EYT 11. 15 -11. 21 IYA prepare for EY evacuation EYA EYC • preparation works before evacuation PRM PR 3 BS IXA EXC EXT block so that beam don’t reach EXT SR 3 SRM AS align POP table optics SRM installation (10. 31 -3. 2) IXC POP SR 2 REFL PR 2 POS IMM IFI TRX IYC EXT BRT installation (9. 4 -11. 24) block so that beam don’t reach SR 3 installation (7. 14 -12. 19) 11

TRY EY Evacuation EYT 11. 22 -12. 8 EYC • monitor beam at REFL, POP, TRY during evacuation • also roughly align TMSX BRT and TRX optics (alignment without ETMX; +5. 6 mm off the center in Y at EXT) IYA EYA evacuate EYA+EYC PRM PR 3 BS SR 3 SRM AS SRM installation (10. 31 -3. 2) IXC IXA EXC EXT POP SR 2 REFL PR 2 POS IMM IFI TRX IYC EXT BRT installation done roughly align TMSX BRT in-vac (11. 27 -12. 1) align TRX table optics (12. 4 -12. 8) block so that beam don’t reach SR 3 12 SR 3 installation (7. 14 -12. 19)

TRY EY Cooling Starts EYT 12. 8 EYC • monitor beam at REFL, POP, TRY, TRX during cool down EYA cool down ETMY PRM PR 3 BS IXA EXC EXT SR 3 SRM AS SRM installation (10. 31 -3. 2) IXC POP SR 2 REFL PR 2 POS IMM IFI TRX IYC IYA keep GVetmy closed (we can open this if we have spare time) block so that beam don’t reach SR 3 installation (7. 14 -12. 19) 13

TRY Alignment from BS to AS EYT 12. 20 -26 EYC • 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 BS IXA EXC EXT POP AS SR 3, SR 2 alignment beam profiling SRM installation (10. 31 -3. 2) IXC POS REFL PR 2 SR 2 PR 3 SR 3 PRM SRM IMM IFI TRX IYC IYA EYA cool down ETMY SR 3 installation done 14

TRY ETMX Installation EYT EYC • during ETMX CRYp installation, initial alignment team have spare time • align AS • 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) EYA cool down ETMY IYA open GVetmy? connect bellows? IYC ETMX CRYp installation starts (1. 8 -2. 2) PRM PR 3 BS IXA EXC EXT block so that beam don’t reach EXC SR 3 SRM installation (10. 31 -3. 2) AS align AS table optics (1. 15 -1. 19) IXC POP SR 2 REFL PR 2 POS IMM IFI TRX 1. 8 -2. 2 align AS in-vac optics (1. 8 -1. 12) 15

TRY Align ETMX EYT 2. 5 -2. 9 EYC • align ETMX right after ETMX CRYp installation completion • also, fine align TMSX and TRX IYA EYA cool down ETMY PRM PR 3 BS SR 3 SRM AS SRM installation (10. 31 -3. 2) IXC IXA EXC EXT POP SR 2 REFL PR 2 POS IMM IFI TRX IYC fine alignment of TMSX BRT and TRX table optics (maybe too dim) 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 EYC • lock Michelson with AS_Q IYA EYA cool down ETMY IMM PR 3 BS IXC IXA EXC EXT POS POP SR 2 REFL PR 2 TRX IYC PRM misaligned IFI fine alignment of TMSX BRT and TRX table optics (maybe too dim) SRM installation (10. 31 -3. 2) SR 3 SRM AS lock Michelson 17

TRY Prepare for EX Evacuation EYT 2. 19 -2. 23 EYC • preparation works before vacuation IYA EYA cool down ETMY PRM PR 3 BS IXC IXA EXC EXT POP SR 2 REFL PR 2 POS IMM IFI TRX IYC fine alignment of TMSX BRT and TRX table optics (maybe too dim) SRM installation (10. 31 -3. 2) SR 3 SRM AS prepare for EX evacuation 18

TRY EX Evacuation EYT 2. 23 -3. 2 EYC • monitor beam at REFL, POP, TRY, TRX, AS during evacuation IYA EYA cool down ETMY PRM PR 3 BS IXC IXA EXC EXT POP SR 2 REFL PR 2 POS IMM IFI TRX IYC fine alignment of TMSX BRT and TRX table optics (maybe too dim) SRM installation done (3. 2) SR 3 SRM AS evacuate EXA+EXC keep GVetmx closed (we can open this if we have spare time) 19

TRY EX Cooling, Test Run EYT 3. 2 -3. 31 EYC • 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) PRM PR 3 PR 2 BS IXC IXA EXC EXT POP SR 2 REFL IMM POS IFI TRX IYC IYA EYA cool down ETMY SR 3 AS cool down ETMX SRM keep Michelson locked 20

TRY PRMI EYT Apr-Jun EYC • • • EYA cool down ETMY IYA PR 2 -PR 3 length adjust (Michelson re-alignment needed) central area evacuation PRM PR 2 BS IXC IXA EXC EXT POS POP SR 2 REFL PR 3 TRX IMM IYC PRM alignment to make PRC SRM lock PRMI with ASC SR 3 cool down ETMX AS IFI PR 2 -PR 3 length adjust PRMI alignment, locking connect remaining bellows/ducts evacuate central area open GVs 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