Calibration and monitoring system for FPD

1
Calibration and monitoring system for FPD

• to check the response of the MAPMT and L0PMT
• as it involves in time ( to see if we have
  any dead channels
• compare the response of the individual
  channels ?)
• LMB (light mixing box) LEDs inside after the
  LED receives
• the electric pulse it emits the light which is
  transmitted via optical
• fibers into MAPMT (L0PMT)

2
LMB light mixing box
FPD has 5 LMBs (dip 36 fibers A1,A2,P1,P2 64
fibers each)
3m long round 1mm
SLP pulse
PIN power (6,-12V,ground)
PIN out
3
SLP pulse
The SLP pulse will be generated by the special
VME boards. These boards are in the moveable
counting house. The pulse will be send via the
long green signal cables to our LMBs in the
tunnel. The leading edge of this pulse should be
sharp (5-15?ns) after the long cable to be able
to produce light.
4
Cartridge

• MAPMT calibration
• - 16 LMB fibers per cartridge
• - each LMB fiber is connected to the bunch
• of 8 250mm fibers
• - each of these little fibers goes to one MAPMT
• channel (there are glued into the cookies)
• L0PMT calibration
• - make another hole and use the spare LMB fibers

5
Layout
1 PIN out (use the spare AMP board, ribbon
cable, AFE board) ? 2 PIN power
(6V,-12V,ground from AMP power supply) 3
SLP 4 ribbon cables 5 optical fibers 6 flat
cables (between MAPMT and AMP)