Difference between revisions of "PITMinutes 07-18-2016"
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1. Operations Status and Summary | 1. Operations Status and Summary | ||
| − | Microphonic damping feet on 0L04 | + | Microphonic damping feet on 0L04 |
| − | + | ||
| + | Correlation studies studies: systematically torque feet and measure microphonics. | ||
| + | |||
| + | Microphonic stabilization equipment installed on SL-24. | ||
| − | |||
Kirk Davis and Tom taking before and after data. | Kirk Davis and Tom taking before and after data. | ||
| − | + | ||
| − | Minimize transfer into cavities. | + | Idea to modify connections and check mode frequencies. |
| − | + | Minimize transfer of microphonics into cavities. | |
| + | Also installed tuner damper to damp MP . | ||
Tuner damper rings in FEL04 also. | Tuner damper rings in FEL04 also. | ||
| − | Controls improvements to improve recovery times. Better | + | Controls improvements to improve recovery times implemented. Better diagnostics |
Periodic trips being observed again. Snooping around for sources. | Periodic trips being observed again. Snooping around for sources. | ||
RF Software improvement? capture trip. reduce interactions tuners and MP they generate. | RF Software improvement? capture trip. reduce interactions tuners and MP they generate. | ||
| − | might be | + | There might be benefit by raising press of SL 3-4 mbar. |
2. C50-12 Warm Girder Study Plan | 2. C50-12 Warm Girder Study Plan | ||
| − | + | Both girders out, module next few days. | |
| − | + | Sampling plan for girders: about 20 different points. | |
| − | + | Samples will be also taken before/after gate valves replaced. | |
| − | + | No visible dirt in beam pipe but dust has been observed. | |
| − | + | Warm valve problems and failures: due to Radiation? | |
| − | + | Added valve update and replacement to work. | |
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | Added valve update and replacement to | + | |
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
3. C75 on hold (Gigi Report) | 3. C75 on hold (Gigi Report) | ||
| − | Complete Efforts for 2 prototypes. | + | Complete Efforts for 2 prototypes. After report will chart |
| + | a course forward. | ||
| − | 2-3 weeks to complete mockup. 3.5 times 10 7 | + | 2-3 weeks to complete mockup. 3.5 times 10 7 for Q_L |
| − | + | Several HOM loads located and low loss window located. | |
| − | + | ||
| − | low loss window | + | |
Magnetic shielding and hygeine produced good result at cavity locations in CM. | Magnetic shielding and hygeine produced good result at cavity locations in CM. | ||
| − | C75 or C50 next year? | + | C75 or C50 next year? Waiting to decide/ |
4. Effects of desorbed gas on FE (Geng) | 4. Effects of desorbed gas on FE (Geng) | ||
| Line 73: | Line 60: | ||
Covering of miniconflat by simple Al foil will not | Covering of miniconflat by simple Al foil will not | ||
| − | be good enough going forward. | + | be good enough going forward. Particles can still get around. |
Joint goal is to have final written procedure leading to low | Joint goal is to have final written procedure leading to low | ||
| − | particulate movements | + | particulate movements. |
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | NeG pump looking good. Will probably use in warm region. | |
Revision as of 09:09, 1 August 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 studies: systematically torque feet and measure microphonics.
Microphonic stabilization equipment installed on SL-24.
Kirk Davis and Tom taking before and after data.
Idea to modify connections and check mode frequencies. Minimize transfer of microphonics into cavities. Also installed tuner damper to damp MP .
Tuner damper rings in FEL04 also.
Controls improvements to improve recovery times implemented. Better diagnostics Periodic trips being observed again. Snooping around for sources.
RF Software improvement? capture trip. reduce interactions tuners and MP they generate.
There might be benefit by raising press of SL 3-4 mbar.
2. C50-12 Warm Girder Study Plan
Both girders out, module next few days.
Sampling plan for girders: about 20 different points.
Samples will be also taken before/after gate valves replaced.
No visible dirt in beam pipe but dust has been observed.
Warm valve problems and failures: due to Radiation?
Added valve update and replacement to work.
3. C75 on hold (Gigi Report)
Complete Efforts for 2 prototypes. After report will chart a course forward.
2-3 weeks to complete mockup. 3.5 times 10 7 for Q_L
Several HOM loads located and low loss window located.
Magnetic shielding and hygeine produced good result at cavity locations in CM.
C75 or C50 next year? Waiting to decide/
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. Particles can still get around.
Joint goal is to have final written procedure leading to low particulate movements.
NeG pump looking good. Will probably use in warm region.
