Minutes of FFIR-meeting on 4/18/96, 9am-10am

participants: Oide,Matsui,Toge,Tauchi

We discussed FFIR design study ( for JLC design study) by following items which Oide presented. We summarize the discussion below.

FFIR Design Study

O. Parameter

Common emittance, dp/P, N/bunch with NLC FF?
>>Common parameters may be usefull for a comparison with NLC study.

1. Detector

>>There is JLC-1 detector (16x16x16m^3) optimized for 0.3-0.5TeV LC.

Energy Range  0.3 TeV-- I TeV--l .5 TeV? 
>From NLC-ZDR;
Higher field?  NLC = 4 T 
Small size?     -> smaller acceptance for muon-background

>>Although a silicon tracker with high magnetic field(4T) should be considered for 1.5TeV LC, we would like to optimize the LC parameters for the JLC-1 detector.
short I*?
Optical anchor? motivated from "SLD vibration > 20 nm, f > I Hz "
>>The SLD vibration cannot be directly applied to future-LC. First we like to confirm previous study of Kanda by measuring a vibration at VENUS detector.

2. IR

SC quad?
>>This option is very attractive because no compensation magnet is necessary. However its inner radius shall be wide enough for synchrotron radiations.
Crab cavity?
Solenoid(detector) effect on optics to be seriously studied.
Diagnostics? -> Do we need "Shintake-monitor" ? Yes.
vacuum chamber

3. Final focus

Common optics for 0.3 - I .5 TeV
Tuning/Feedback simulation

4. Collimation

collimation depth?
material?
wakefield?
muon track/shield up to I .5 TeV

5.Beamdump

recyle?

6. Beam switch/matching section

two IPs(gamma gamma and e-e- collisions)

7. Instrumentation

magnet
BPM
BSM
mover 
control 
machine protection

8. Polarimetry

We will continue to discuss the above list to realize the JLC design study until next spring, 1997.