Minutes of E362 FD weekly meeting
97/05/30, 15:00-16:30, Library meeting room
Present:K.Nishikawa(Chairman),T.Ishii,Y.Ohyama,T.Ishida,T.Kobayashi,S.Mine,
T.Inagaki,A.Sakai,M.Sakuda(KEK),T.Maruyama(Tohoku),T.Kadowaki(SUT),
M.Kohama(Kobe),E.Jeong,H.Li(Chonnam),E.Sharkey,B.Williams,R.Reese(SUNY),
M.Nakamura(Niigata)

(1) Experimental Hall (Nishikawa)
Power supply to the experimental hall was scheduled in December 1998.
He asks the plant maintenance department to start power supply in 
September 1998 at latest. 
There will be 10-15m of a concrete floor at the GND level surrounding 
the experimental hall. 
 We will have cross-beams between pillars since no one complained about them.
 
(2) Muon (Ishii)
*Ishii/Jeong/Li/Shiino/Tauchi finished 10 sets out of total 58 sets.
They have sometimes problems with z-type chambers.

(3) LG (Kobayashi) 
He summarizes the report from the LG meeting (May 28).
He studies the peak pulse heights of 9 LG counters for cosmic-rays. After
correcting for the geometry effects and the gain drift using xenon monitor, 
he found their peak values stay within +-5%. He thinks that he can do the
calibration of all LG counters using this method. However, he must check
the stability of the xenon monitor and its connection to LG etc.
 
(4) SCIFI 
 Sakuda reports:
*BU group wants to use 2mm thick 6cmx10cmx2.4m Al tubes. Their plan to mill 
the surface of the tube into 1.5mm thick tube turns out to be very expensive.
 He calculates the water fraction to be 69% (BU) and 75% (Toyama Co).
*He wants to use a honeycomb panel for a sheet module. weight=0.5g/cm^2.
 Mine reports:
*they put things in order at AR and Nikko to prepare for the cosmic-ray test
 and VETO counter test.
*In the cosmic-ray test, he will use 5 fiber sheets (4cm wide x 1.5 m long). 
 Mine/Sharkey/Kadowaki are making fiber bundles using epoxy. When it is done,
 the face of the bundle will be polished at Suzuno next week. 
*Using the cluster program, he found the noise rate of IIT to be a few clusters
 /IIT/trigger if he requires 5-10 pixels for the cluster. This is satisfactory.

(5) Beam monitor (Maruyama)
*Williams reports the analysis of the muon minitor proto-type test. 
 He compared the profiles of the prototype and the beam profile monitor 
 (reference) for 5 different positions of the beam. He found that in both x 
 and y directions the beam center which the prototype gives agrees
 with that of the reference monitor within +-1mm. 
*Inagaki tries to understand the total charge (pulse height) of the prototype
 using the dE/dx and multiplication factor etc. 

(6) DAQ 
Sakai summarizes the meeting of the beam trigger signals with the accelerator
group. They supply us with 3 kinds of signals; (1) 20 msec before the neutrino
beam -> Horn, (2) 1.1 msec before the neutrino beam ->Horn, Front detector,
(3) 10 microsec before the neurtino beam -> Front detector.

(7) Others
*Nishikawa showed the write-up for the KEK neutrino committee where the 
 function of the fine-grain detector and 1kton detector must be clarified.
 Dr. Nakamura will summon the meeting in late July or August (?).
*Sakuda points out that the flux of the neutrinos is 11% more if the front
detector is located at 290m instead of 300m from the target. +23% at 280m. 
//(M.Sakuda)