Minutes of E362 FD weekly meeting
97/01/14, 19:00-21:00, KEK library meeting room,
Present:K.Nishikawa,T.Ishii,T.Chikamatsu,A.Sakai,T.Kobayashi,T.Inagaki(INS), 
M.Kohama,S.Echigo(Kobe),M.Sakuda,Y.Ohyama,T.Ishida(KEK),T.Maruyama(Tohoku),
M.Etoh(Tokai),I-T.Lim,E-M.Jeong,K-J.Ma(Chonnam)
  
(1) Horn 
 Kohama calculates the flux at various horn currents. He expects 10% more 
 flux at 300kA than that at 250kA although the second horn cannot accept 
 300kA due to the mechanical stress. He also calculates the flux at various 
 disatances between the first and the second horn. The present value is good.

(2) TOF (Ohyama)
 He asks Suzuno Co to estimate the cost when re-using the existing light pipes.

(3) DAQ 
 Sakai estimates the number of racks necessary for the electronics-hut to be 
 about 13. He also updates the estimation of the data size, 16kbytes/spill.
  
(4) SCIFI 
*Ishida checks the beam intensity of pi/proton/e at T1 (0.5-2GeV/c) and 
 pi2 (1-4GeV/c) beam lines. Since he is interested in the electron 
 identification with the scifi detector, he will consider INS e- beam.
 Sakuda comments that the proto-type detector will be completed around June.
*Sakuda summarizes the meeting with Hamamatsu on Jan 14 (Nishikawa,Sakuda,
 Etoh,Echigo).
  Hamamatsu points out that the quantum efficiency of IIT that we have now
 is higher (25%) than the standard one (22+-2%). We must increase the light
 yield by at least 20% in order to keep the present performance (99%). 
 -->A larger fiber diameter, an aluminum coated fiber, silicon oil contact 
 between fibers and IIT, quality of the reflectivity at one end of fibers etc.
   Etoh/Echigo showed the detection efficiency is down by 1-2% toward the edge
 of IIT face. Hamamatsu checks the uniformity of lens within this month. They
 do not think this is due to the non-uniformity of photo cathode. However, 
 they will measure the uniformity of the IIT photocathode for 5 IITs being 
 produced. 
   They show the first design of the HV system. The design of the MCP-CCD+HV 
 system must be finished in June 1997.
*Etoh/Echigo will measure the reflectivity within this month for the sample 
 which Kawai Optics Co supplied. 
*BU group sent us a memo on the design of the water container. Please read it
 and return any comments to Sakuda. S.Kim will visit KEK soon to discuss it.
***SCIFI group meeting will be held at Kobe on Feb 1 to discuss the schedule of
 the scifi detector.  

(5) Muon detector (Ishii)
*Leak test is finished. 
*Tension measurement of short chambers (previously called F/B chambers)
 -80% done. All wires (400x8) are good except for only two wires! They are 
 preparing for the cosmic ray test.  
*Tension measurement for long chambers will start in February. It will be done
 at the east-counter hall after the Horn will have been moved. 
*They have three collaborators from Channam, I.Lim, K.Ma and E.Jeong.
 Shift members are Ishii,Mine,Shiino,Inagaki,Lim,Ma and Jeong.

(6) LG (Kobayashi)
*Beam test with 3x3 blocks is scheduled for Jan.28-Feb.1. Inagaki,Kobayashi,
 two students (Kenmochi et al) from Niigata will go to INS next week. DAQ 
 system is being tested.
*HV cables for all LG blocks have been ordered. Signal connectors will be
 delivered in Feb. LEMO cables will be supplied by ICRR. Fibers for the xenon 
 lamp have been ordered.
*Taino considers doing the calibration for 600 blocks inside the tent house.

(7) Analysis (Chikamatsu)
*He will distribute the documentation of the detector simulation within
 a week. He sets up an example program and a set of library in /home2/E362/.
*He shows a concrete set-up of 900 mudules of the muon detector. He says that
 we should use 5m long chambers for the last few layers since high energy muons
 tend to go in the forward direction.

(8) Beam monitor
 Inagaki (and Maruyama) begins the gain calibration of a 16ch multi-anode PMT 
 using LED. Since he hardly locates the 1p.e. peak, he will use amplifiers.  
//(M.Sakuda)