PITMinutes 07-18-2016
Attendance
R. Bachimanchi, M. Drury, R. Geng, C. Hovater, A. Hutton, G. Krafft, A. Kimber, C. Mounts, R. Nelson, T. Plawski, T. Powers, C. Reece, T. Reilly, R. Rimmer
Agenda and Notes
1. Operations Status and Summary
Microphonic damping feet on 0L04: correlation studies torque unused feet and microphonics.
Stabilization equipmment on SL-24\: Kirk Davis and Tom taking before and after data. Modify connections and check mode frequencies. Minimize transfer into cavities. Tuner damper to damp MP installed.
Tuner damper rings in FEL04 also.
Controls improvements to improve recovery times. Better diagnsotics Periodic trips being observed again. Snooping around for sources.
RF Software improvement? capture trip. reduce interactions tuners and MP they generate.
might be benefity by raising press of SL 3-4 mbar.
2. C50-12 Warm Girder Study Plan
zBoth girders out,
Modules next few days.
Sampling plan for girders.
About 20 different points.
Samples will be also taken as gate valvues replaced.
No visibliy dirty in beam pipe but dust has been observed.
valves problems.
warm val failures
Radiation problems?
Added valve update and replacement to allow work, Warm regions will be pulled and looked at and processed in SRF institute. Studies of warm girders next to the removed 1L12 cryomodule. Cryogenic planning for C50-12 discussed at 2:30. May have to warm up NL10 and NL14 also. Talk through cycling of internal valves from contamination point of view.
Clean interior of both sides.
3. C75 on hold (Gigi Report)
Complete Efforts for 2 prototypes. ARD
2-3 weeks to complete mockup. 3.5 times 10 7
several HOM loads located . Gradient and load and loaded Q
low loss window loacated.
Magnetic shielding and hygeine produced good result at cavity locations in CM.
C75 or C50 next year?
4. Effects of desorbed gas on FE (Geng)
Desorbed gas report coming.
Covering of miniconflat by simple Al foil will not be good enough going forward. Paticle can still get around.
Joint goal is to have final written procedure leading to low particulate movements,
NeG pump looking good.
