67th ATF2 meeting

KEK site meeting

1. KEK home-works at the 5th ATF2 project meeting, Toshiaki Tauchi (KEK)

We discussed on KEK home-works which have been raised at the 5th ATF2 project meeting., where C, Q and A are comments, questions and answers, respectively.

1. Movers

   Draft agreement with Tor (SLAC)
   • Tor concurred that ATF2 group may keep and use all of the SLAC movers, which have been brought to KEK, during the commissioning stage, till near the end of 2009.
   • Kaoru and Junji agreed with Tor that ATF2 should submit an analysis reporting to Tor the extent of the group nessesity of these movers by/at that time (i.e. near the end of 2009).

2. Commissioning

   • availability of power supply system
   • T. Okugi, minimum optics for transportation of beam to dump first study on March 2006 ( weekly meeting )

   C : 6 matching quadrupoles ( QM11-16) must be used in the minimum optics. In addition, 3 quadrupoles of QF7, QD4A and QD2B are used. 3 + 1 bending magnets are also used.

   Q : We need information of currents for these magnets, 13 in total, and number of steering magnets, monitors etc. .

   C : Also, we need re-evaluation of the minimum optics consistently with latest optics v3.8 .

3. Instrumentation

   • J.May will make a detailed list of hardwares for QBPM installation.
   • Simulation without 3 movers
   • IPBPM set in Shintake monitor with bellows

   C : We should remind Justin for the list.

   C : Okugi will estimate performance without 3 movers after Indian seminar in January 2008.

   Q : Honda will make procedure to install IPBPM with bellows in the BSM-IP chamber.

4. Remote participation

   • international-capable phone line, cool video equipment, ATF data server, eLog improvements, �c
   • Webex access (with callback) to Monday 13:30 meeting?

   C : Terunuma will prepare a remote participation with no use of Webex. Especially, until a beam commissioning, i.e. first beam operation at ATF2, we will be able to connect to the ATF internal network for tuning QBPM and mover systems from SLAC and also other system such as LW and FONT from UK etc. . By the commissioning, the remote tuning will be prohibited. As explained in the project meeting, monitors can be available in nearly real time with local data base in DMZ of KEK network system.

   C : It is possible to use the Webex supported by GDE at the Monday meeting. We will discuss on this issue there.

   C : We should ask experimental groups instead of shift leaders for utilizing eLog at ATF control system. The eLog will accept figures, graphics as well as text. We will discuss on this issues at the Monday meeting, too.

5. Flight simulator

   • SAD implementation in Flight simulator
   • importance of coordination for international collaboration

   C : We reaffirmed the international collaboration and importance of coordination in order to realize a flight simulation at ATF2/ATF . Coordinator should break up the simulator into tasks and identify responsible person for each task. Also the coordinator should administrate a time schedule to complete the flight simulator.

   C : Shigeru Kuroda has been nominated for the coordinator. We urged him to take initiative in this international collaboration.

6. Magnet

   • manifold of cooling water for QD0, QF1
   • "Supports under FF sextupoles, that fit in with the BPM support. Discussions with Honda-san today have established who is designing and fabricating which parts." Who ?
   • "Hardware installation process will require careful planning as movers will need power to be installed; cable plant may not be installed before the movers need to be installed, so will have to use temporary cables & power supply."

   A : KEK will fabricate the manifolds to meet JIS, which will be set at side-shielding walls.

   A : SLAC (C.Spencer) will make stands for the 3 FF sextupoles. KEK (Y.Honda) will make interfaces between stand and mover.

   C : All the movers will be set in January 2008 without AC powers. Alignment of magnets will be within dynamic range of mover, i.e. ±1mm . Installation of magnets will start on 7th January 2008.

   Q : Are there cables for the movers or we should prepare them ? We should ask Doug for details.

7. Power supply

   • HA PS : first batch in transit, second batch by Jan 2008
   • SLAC is working on the donation paperwork, shipping in April 2008
   • SLAC responsibility to be updated

   C : We would like to know results of US budget crisis for shipment and installation process, which has been occurred just before the project meeting.

   C : We should go to SLAC for this purpose as early as possible in 2008.

8. FD-support

   • support of s-band BPMs at SD0 and SF1; LAPP will fabricate
   • support of s-band BPMs at QD0 and QF1; they are bolted to the magnets

9. GM-measurements

   • Vibration measurement with seismometers at new ATF2 beam line and comparison with that in the ATF Ring.
   • Floor movement measurement with HLS system.
   • Measurement of daily variation of the floor tilt.

   C : Since Sugahara has only 3 HLS systems, he will ask S.Takeda for more HLS systems. At the project meeting, it was pointed out that FNAL has about 100 HLS systems.

   Q: There are cracks at ATF2 floor as Andrei pointed out during tour at the project meeting. How deep are they ?

   A : The depth is expected to be shallow. We may inspect them by dig around a crack. A crack was actually measured on 27th December. The result was reported here, and it will be presented at next meeting, 9th January 2008.

   A : We can measure GM across cracks to observe any effect, i.e. in-coherency for deep crack.