We discussed on purpose of s4 phone meeting and a plan. The meeting is a series of s4 task force meetings for reviewing work packages of BDS studies towards EDR. The task force defined the purpose as follows ;" The primary questions that are suggested to be addressed are
You can find summary of this discussion in this PDF file.
R,Sugahara reported a meeting minutes of KEK-ATF2 magnet group which has been held on 30th March 2007. The group has surveyed the ATF ring and extraction line for 14 and 15 February, and has marked several points on the ATF2 beam line for 22 and 28 March. The results can be found in the above file.
New coordinate system was proposed for better correspondence with the tracker coordinate system for easier alignment work. The new one has x in north direction, y in west direction and z in upward .
There is a confusion in naming of magnets. Magnets with a common power supply should be relevant in their names such as xxx.1 and xxx.2 usually. However, this naming is used for a single magnet to specify the center of the magnet in SAD-file. Also, numbering order is opposite across the matching section. S.Kuroda was asked to make suggestions to be discussed at the next project meeting.
Effective lengths of QEA magnets (IHEP) will be calculated by using mapping data which have been taken by the Hall element.
New ATF2 beam line level will be aligned with respect to quadrupole magnets near the extraction from DR.
The next ATF2 meeting will be held on 18th March 2007, 2:30pm -, 3-gokan, 725, KEK, TV-ID#=31110 with the KEK Gatekeeper and WebEX. there will be the S4 expanded meeting -- ATF2 project by phone/WebEX ( invitation only) on 11th April, 2:00pm.