LCLSII CMTFLERF Cryomodule Testing Considerations E Daly 20

LCLS-II CMTF@LERF Cryomodule Testing Considerations E. Daly 20 -JAN-2018

Outline • Overview • Features • Assumptions / Constraints • Current Plan 20 -JAN-2018 2

Features of LERF Test Bed • 16 HPRF/LLRF channels in steady state operation • Maximum flow rate for cooldown ~ 30 g/s • Cold compressor load balancing considerations • Operating temperature – 2. 07 K • Steady state and d. P/dt Qo measurements • Decarad radiation monitoring system • Warm-up and cooldown cycles independent of CEBAF operations • U-tube operations have minor impact 20 -JAN-2018 3

Overview for LERF Schedule • Baseline includes three phases: • Phase 1 – Set Up, currently on-going, plan to complete in JUN 2018 • Phase 2 – Full Power Testing, beginning JUN/JUL 2018 - Four cycles with 2 CMs each in the plan - Typical test cycle is 5 -8 weeks - Change-over is ~ 6 wks • Phase 3 – Reconfiguration - Return SLAC-provided hardware at conclusion of testing 20 -JAN-2018 4

Assumptions / Constraints • CMTS & CMTF have priority for CMs compared with LERF • CMs chosen when available from excess production inventory at either lab • Due to parallel rework, schedule acceleration or when a production CM misses its intended testing slot. • CMs planned for LERF • Gas-guard valves installed • Instrumentation, cabling & channels match production CM P&ID • p. CM testing is possible but will NOT measure additional instrumentation inside the CM. • Test two CMs per cycle • First cooldown shall be coordinated with CEBAF down time in Summer 2018 • Goal is to NOT require coordination with CEBAF after this first cooldown 20 -JAN-2018 5

Current Plan • J 1. 3 -03 identified for first testing cycle • Needs retro-fit work completed by April • Acceptance testing completed in CMTF • CMTF results available for comparison • CMTS & CMTF contain CMs in test and have next CM identified (CM -07 at JLab, CM-09 at FNAL) • Currently no excess production inventory at either lab • F 1. 3 -03 is being reworked at FNAL • J 1. 3 -06 re-build starts after J 1. 3 -13 in May 2018 • Evaluate CM assembly near term schedules at each lab monthly looking for first testing opportunity • If no CMs are available, consider adding one of the p. CMs as second CM as part of first testing cycle (J 1. 3 -01) • Only connect production instrumentation for p. CM • Cross-check with FNAL p. CM 20 -JAN-2018 6

Possible Test Cycle Cooldown 1 (summer 2018) • J 1. 3 -03, F 1. 3 -03 (gas guard valves installed on both, both have rigid connection between cavity #1 and GV) Cooldown 2 (fall 2018) • J 1. 3 -06, TBD ( Full production CMs) Gas guard valves and bellows between cavity #1 and GV. • Full CM testing routine Cooldown 3 (winter 2018) • TBD Considering re-test of p. CM • Q measurements, validation of coupler #8 on J 1. 3 -01, microphonics with rigid connection from cavity #1 to GV 20 -JAN-2018 7

Back Up 20 -JAN-2018 8