Minutes of Quick Calorimetry Meeting  18-7-97.


Present:   DJAC, PSF, BWK, ALL, MS.


ALL   APD irradiation work almost complete, just one set of readings per day
      for 2 weeks to check gain stability of control APD.
      This week made new mounting for EG&G APD to mount on brass box for 
      scanning PWO crystals from PSI. Fitted fully screened  Pt100 thermometer.
      Working on pipework for Sulphuric acid flush of magnet cooling pipes
      in test beam area.
      Fibreoptic has arrived for beam hodoscope and is a perfect fit in the
      EDM machined grid to fit on multi anode PMT.
      Plan is to commission hodoscope in the ISIS run starting on 6-9-97.
      VPT test magnet in R5.2 to be commissioned during this time ready for
      testing with new "armature" in September.
      Still need Hall probe in BM1 before next cycle.


MS    Set up APD in brass box, tested with PWO 762 and then scanned 4 new
      crystals which were scanned at PSI.   
      Scanned Paul's glass blocks, initial data which showed a fall off in yield
      close to the photodetector was due to the rough data containing pedestal
      data in the arithmetic mean. When cleaned up the effect disappeared.
      Next week scan glass towers in ISIS.

BWK   This week, wrote a draught note on End cap geometry, another draught
      soon.
      Worked out corner co ordinates for crystals and supercrystals, sent
      list of numbers to Len Denton, will post on WEB.
      Will agree Fortran package to use with John Hayes.
      Need to change program slightly to analyse test beam data.


PSF   Will polish glass block ends for tower run.
      Persuading Russians to give more HfF4, sent them data on blocks made 
      so far, showed timing curves.
      Next week look at yield data, look at Russian doped samples in test beam.
      Found source of lead bricks for Cs137 source castle, for irradiation of
      doped samples.
      

DJAC  Lead Tungstate crystals sent from PSI to Germany then air freight to
      UK, took 2 days to RAL.
      Wrote ECAL Endcap minutes for CMS week.
      Discussions on geometry with Bruce and Len.
      Next week, CERN Monday for ECAL Technical board, Tues. CMS UK meeting
      at IC then RAL.
      We have 2 VPT's from St Petersburg, they are with Eddie Bateman for
      evaluation.


Laurie Lintern   24-7-97.