Memorandum
C-wire (PIP, Post IP wire scanner) status, Doug
We saw carbon wires, so they were confirmed.
Now, software is being debugged.
By eye ball, the wire positions will be aligned within mm range and the dynamic one is +/- 6mm as the same as LVDT .
First we will start with 10um W wire.
Scheduling status, Okugi
- non ATF2
startup shifts need 1 -2
- LINAC RF phase needs fine tuning - SLED
- DR
cavity Compton needs 1
- ATF2 - 7 shifts in total
FONT 2 shifts
IP BPM 3 shifts
cavity BPM 2 shifts for
- saturation signals - check the extrapolation
- non-mover BPMs with Glen's FS and Stewart's code
- s-band BPM calibration
- Yves, Mark will check the orbit with calibrated BPMs including stripline BPMs
- C :Trigger issue ; timing jitter remains
- C : Beam tuning ;
Mark will join in the BPM calibration, Glen's remote participation in Wed. Owl .
The beam tuning will be dispersion and coupling corrections .
- C : Commissioning of post IP wire scanners needs small background in the same condition as IPBSM.
- C : Terunuma ;
Naito is working on the timing at very beginning upstream.
- SLED timing tuning may need several hours
- C : The BPM calibration : in day time, debugging is very inefficient because of non-availability of Stewart
, while Alex can do calibration .
- C : IPBSM commissioning with new background detector ;
1 shift for beam tuning for less background and 2 shifts for IPBSM studies
- C : ATF2 beam tuning with the background detector ( IPBSM ), too.
November plan by Philip
- cavity BPM -- beam tuning - BBA, Glen automatic procedure (FS)
- dispersion correction
- precision? - propagate to IP and compare the measurement at IP
- gradually setup shifts according to the check list to be defined at the beginning
- BBA, BPM calibration,
- dispersion measurement at EXT
orbit dump tests
- C : Okugi ; in next week, hardware commissioning of OTR and C-wire scanners should be first.
- C : Philip ; OTR commissioning can be done in parallel of "emittance measurement "(wire scanners)
- C : Terunuma; Its difficulty is the small dynamic range of um order, it takes time to find the beam
- C : Philip; Tue. day shift for the OTR commissioning ? Also a half shift for the C-wire scanner by Doug
- C : Terunuma; C-wire checking ; it is OK now. For the movement - SLAC controller was broken , then was exchanged . However we can not read back. Anyway, it can be used. So, we will find C-wire in the middle of chamber .
- C : Philip; this week concentrate the dispersion
- C : C-wire commissioning just find signals , can be done in Tue. day
- C : Philip; bkg should be the same low as IPBSM.
- C : Terunuma; The case of 7um C-wire at EXT has not been so difficult to find signals.
- C : Okugi ; bkg strongly depend on the waist position, e.g. it was high at IP, low at PIP .
- C : Mark ; ATF2 beam tuning consists of ;
- orbit tuning - BBA
- dispersion
- coupling
- beta matching