ATF2 weekly meeting

Wednesday 7 Oct 2009, 14:30 → 16:30 Asia/Tokyo

Draft minutes updated (red) on 15 Oct d091007.html

International phone/webex meeting

1 Alignment results for SLAC magnets in the ATF2 beam line

Speaker: Mr Ryuhei Sugahara (KEK)

Slides after_align_ofSLACmag.pdf

2 Brief discusion on the commisioning in this fall

Speaker: Philip Bambade (Laboratoire de l''Accelerateur Lineaire (LAL) (IN2P3) (LAL))

Slides tasks-ATF2-Fall09-Com.pdf

3 First analysis results of EXT MW0-4 X,Y,-10,-10 wire-size measurements to reconstruct the 4D betatron phase-space

Speaker: Dr Cecile Rimbault (LAL)

Slides Rimbault_7oct2009.pdf Rimbault_7oct2009.ppt

KEK site meeting (Japanese)

4 Progress of Shintake monitor work

Speakers: Mr Masahiro OROKU (Tokyo Univ.), Mr Takashi Yamanaka (The University of Tokyo)

Slides Progress_of_Shintake_Monitor_Work_091007.pdf Progress_of_Shintake_Monitor_Work_091007.ppt

Site: KEK ATF LC Container Time: 16:00(JST)-18:30 Participants: Tauchi, Terunuma, Okugi, Kuroda, Aryshev, Bambade, Yamanaka, Oroku, Yamaguchi(WebEx) * New Laser Installation Q: Is the unseeded pulse stronger than the seeded pulse? Then can the unseeded pulse be used for the collision with the beam to raise S/N ratio? A: The unseeded pulse is strong but the unseeded pulse isn't coherence. So it can't be used for interference mode. - Check of Cooling Power of Laser Chiller Q: How much is the temperature of the external cooling water? A: The preset temperature is 15 deg C. Q: The result of the temperature measurement shows the internal cooling water termperature is higer than 27 deg C even after the laser is off. Is the measurement correct? A: It seems the optimum temperature of the laser is about 26 deg C. The laser system itself controll the flow rate of the external water and adjust the temperature of the internal cooling water. * Gamma-ray Shutter Q: Does the shutter mover use rail or something to slide? If not, it will get stuck in long-term operation. A: No. The lead block move just on the flat metal plate. Q: Is it possible to put the shutter behind of the background monitor? Because, the gamma-ray shutter is for the CsI(Tl) detector and the background monitor should be independent of the shutter. A: There is limitation in the available space, so it may be difficult. Anyway we will try. * Detector Interlock C: It is desired to keep HV to the detector. Then the interlock should be prepared to the gamma-ray shutter rather than HV module.