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August 20 16:00 - 17:30, ATF LC meeting room, KEK
Participants : Tauchi, Terunuma, Kuroda, Okugi, Oroku, Yamanaka, Kamiya(WebEx)
*** Progress of Shintake monitor (ATF2 IP-BSM) work ***
**Slides by Masahiro Oroku (Univ. of Tokyo)**
--IP chamber--
*The vacuum chamber was installed to the shintake table on this morning
*Alighnment were by eyes: setting the chamber to the table line
*The leak test of frange are going to be performed using Helium at tomorrow morning
**Other issues**
--slit scanner--
*how to do laser alignment by slit scanner?
Slit scanner is used as the target like pin hall. A photo diode is set after slit scanner to monitor The amount of light coming through the slit.
The plan is as follows
1. calcurate the interferrence point from the optics.
2. set the slit scanner there
3. check that light come through the slit
4. After laser optics changed, the position reproducability is obtained by slit
*Why use slit?(not pin-hall)
To make it possible to perform laser alignment in differernt angles (the laser optics to make interference have 3 types of angles)
-- Next meeting --
At the meeting on Oct 1, the present status of Shintake monitor is needed.
One page slide will be sent to Stewart.
At ATF2 weekly meeting on Oct 8, the specification of IP-BSM, for example the data set and the way how to measure beam size, will be presented.
-- Interface --
* There are two kinds of database used in ATF.
One is V-System which needs fees. The other one is EPICS which is free.
So we can use EPICS.
What we need to make the Shintake monitor interface are writing a Linux-based
C-language program for beam size measurement and command request in EPICS.
