Minutes of E362 FD weekly meeting
96/12/02, 19:00-20:30, KEK library meeting room,
Present:K.Nishikawa,A.Sakai,T.Kobayashi(INS), M.Kohama(Kobe),K.Nakamura,
M.Sakuda,Y.Ohyama,T.Ishida(KEK),T.Maruyama(Tohoku),M.Nakamura(Niigata)
  
(1) Horn (Kohama)
*A pulsed current operation (25kA) continues. 
The measured stress is consistent with the calculation. 

(2) TOF (Ohyama)
Dismantling 64 TOF counters (4.2cmx13cmx400cm) from TOPAZ began this week.
We will have enough counters for the veto/trigger system.

(3) LG (Kobayashi) 
*The trigger hodoscope for 3x3 blocks will be delivered soon. The beam test 
 at INS is scheduled in late January.
*The calibration of 600 LG blocks using cosmic-rays is scheduled in June 1997.
 Tamura/Ken-mochi will join the work.  
*He need many plastic scintillators for the hodoscope.
  
(4) SCIFI (Sakuda)
*Suzuno Co. starts building the drum according to the draft by Kawai/Ishii.
*The deformation of a 3m long water container will be measured within a week.
 After examining the result, we will talk with US group about the next step. 

(5) Structure meeting with Kawajyu Co. 
*The specification document is handed to Kawajyu. (Ishii,Sakuda,Chikamatsu,
 Kobayashi).
*The size of the iron filters and the structure is nearly fixed. (Kawajyu Co)
*The LG modules will be set in a same way as they were set in TOPAZ. 
*Nakamura explains that the present (still tentative) experimental hall
has a cylindrical shape with 24m in diameter. Every detector component must
be as compact as possible to reduce the size of the hall.
*Next meeting with Kawajyu Co. -> 12/17(Tues) 14:00-15:30.
                                  -----------------------
(6) Analysis
Kobayashi estimates the event rate per spill where the neutrinos interact 
with the soil and enter the 1kton detector: 0.25muon,0.195pi+-,0.11proton,
0.017neutron and 0.047gamma (0.7/spill in total). He will check if some of
0.25muons overlap with 0.195pi+-. He also checks the rate that was formerly
calculated by Itow.

(7) CPU 
Sakai attended the CCPS users meeting. The system has now 22 CPUs. Ohyama will
talk with T.Suzuki about the usage of ccps computers.

(8) Pi-monitor
Maruyama shows a new design for the pion monitor. It is placed after the
2nd horn and measures the charged pions using a gas Cherenkov counter 
(n=1.003). The detector is about 1m long (z) and 60cm in r direction 
and covers a fan-shaped region of about 20 degrees in phi. The photons 
produced are reflected by a spherical mirror. They are reflected again 
at the focal plane by a flat mirror and then lead to the multi-anode PMT. 
This way, the angular distribution of charged pions can be measured.
The beam test of the proto-type is scheduled in June 1997. 

Others:
*PS PAC, December 12. 
//(M.Sakuda)