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Pass 5 H Separator Turn on Issues and Resolution

6 days 6 hours ago
Log Number: 4532258Logbook(s): Entry Makers: alexsBody: 

The 5th pass horizontal separator could not be brought back up over the weekend when attempting to do cavity by cavity phasing. Initially, it was suspected there was some bug in the script because it would reach the DSET Ramp step of the turn-on script and get stuck jumping between two DSET values endlessly.

After digging in to this, it looks like the issue was a case of bad luck and operational windows being too strict. When the DSET Ramp stage of the turn on script begins, the DSET will cycle between the DSET Begin value and an increase based on the DSET step value.

alexs

FSD Masking Tool: Successful System Masking for: BeamLossMonitor

6 days 6 hours ago
Log Number: 4532246Logbook(s): Tags: Body: System Masking for: BeamLossMonitor
User: schoene
Areas: All

BeamLossMonitor Devices:
ILM0I07
ILM0L01A
ILM0L01B
ILM0L02
ILM2D00A
ILM2D00B
ILM0L04A
ILM0L04B
ILM0L05
ILM0L06A
ILM0L08
ILM0R01
ILM4D00
ILM0R03
ILM0R04
ILM0R06
ILM0R08
ILM0R09
ILM1L01
ILM1L02
ILM6R08
ILM3S00
ILM7S00
ILM9S00
ILM5S10
ILM5E03
ILM7S01
ILM9A01
ILM3E02
ILM5A01
ILM1A04
ILM1A06
ILM1A09
ILM5A10
ILM1A16
ILM1A19
ILM3R10
ILM9R07
ILM1R09
ILM2L03
ILM5R10
ILM5R05
ILM2L01
ILM2T09
ILM8T0
schoene

Injector work summary

6 days 6 hours ago
Log Number: 4532244Logbook(s): Entry Makers: ywangBody: 

0830 - 1030
Followed the test plan, Reconfiguration of injector and Hall C for fifth pass
1. Down loaded files specified in the test plan
2. Changed C laser rep rate from 500 MHz to 250 MHz
3. Optimized the injector for high current. Orbit did not reproduce
Fig. 1: C beam, 80uA, to ILD
Figs. 2 & 3: B's and D's orbits relative to D's, respectively
Figs. 4 & 5: B beam, 500nA, and D beam, 10uA, to ILD
Fig. 6: Injector BEM

ywang

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CEBAF Program
MCC Crew Chief Forman
MCC Operators Schaumloffel, Yoon
Program Deputy Latosky
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