Difference between revisions of "Polarimeter Documentation"

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==== Existing Scintillator Bars ====
 
==== Existing Scintillator Bars ====
 
===== BLAST bars  (some from PSI LADS detector) =====
 
===== BLAST bars  (some from PSI LADS detector) =====
−
   Ohio walls: 16x      10 cm x 22.5 cm    x 400 cm
+
   Ohio walls: 16x      10 cm x 22.5 cm    x 400 cm <-- these are the ones we are principally interested in
 
   LADS15:    28x      15 cm x 14.5 cm(*) x 160 cm
 
   LADS15:    28x      15 cm x 14.5 cm(*) x 160 cm
−
   LADS20:·    28x      20 cm x  9.8 cm(*) x 160 cm
+
   LADS20:     28x      20 cm x  9.8 cm(*) x 160 cm
 
   (*) bars are trapezoidal shaped; this is mid-point thickness
 
   (*) bars are trapezoidal shaped; this is mid-point thickness
−
* Availability:  '''Yes'''  (needs to be shipped to Kent St/JLab)
+
* Availability:  '''Yes'''  (we have a promise that the Ohio walls are ours; they can remain at MIT for the time being.  ''A trip to take a look at them and confirm their condition would be wise.'')
 
* Location:      BATES
 
* Location:      BATES
−
* Contact:        Michael Kohl
+
* Contact:        Michael Kohl / Bob Redwine (MIT)
 
* References:      [[Media:Hasell_NIMA603_2009_247_BLAST.pdf |NIM A 603 (2009) 247–262]] (BLAST detector), [[Media:Alteholz_NIMA373_1996_374.pdf |NIM A 373 ( 1996) 374-38]] (PSI LADS reference)
 
* References:      [[Media:Hasell_NIMA603_2009_247_BLAST.pdf |NIM A 603 (2009) 247–262]] (BLAST detector), [[Media:Alteholz_NIMA373_1996_374.pdf |NIM A 373 ( 1996) 374-38]] (PSI LADS reference)
 
* Notes:
 
* Notes:
−
** Bars would need to be cut and polished
+
** Bars would need to be cut and polished (Kent State?).
−
** The LADS bars are trapezoidal; they can be stacked into planes by alternating the 'wedge' direction
+
** New PMTs are likely.
−
** Needs new PMTs
+
** Primarily interested in the Ohio walls.
−
 
+
*** The LADS bars are trapezoidal; they can be stacked into planes by alternating the 'wedge' direction.  Not even sure if they are available as well(?)
  
 
===== "BigBite" HAND =====
 
===== "BigBite" HAND =====

Revision as of 16:18, 30 September 2014

C-GEn "Plan B" Polarimeter

C-GEN Polarimeter Design / Documentation

Possible scintillator hardware

The "Plan B" design requires:

  • Total: 136x 10 cm x 10 cm "thick" bars
108   10 cm  x 10 cm x 160 cm   E counters (top + bottom)
 28   10 cm  x 10 cm x 160 cm   analyzer bars
  • Total: 80x 1 cm x 10 cm "thin" bars
 52    1 cm  x 10 cm x 160 cm   dE  (top + bottom)
 28    1 cm  x 10 cm x 160 cm   analyzer vetos
  • All bars are double-ended readout.

Existing Scintillator Bars

BLAST bars (some from PSI LADS detector)
 Ohio walls: 16x      10 cm x 22.5 cm    x 400 cm  <-- these are the ones we are principally interested in
 LADS15:     28x      15 cm x 14.5 cm(*) x 160 cm
 LADS20:     28x      20 cm x  9.8 cm(*) x 160 cm
 (*) bars are trapezoidal shaped; this is mid-point thickness
  • Availability: Yes (we have a promise that the Ohio walls are ours; they can remain at MIT for the time being. A trip to take a look at them and confirm their condition would be wise.)
  • Location: BATES
  • Contact: Michael Kohl / Bob Redwine (MIT)
  • References: NIM A 603 (2009) 247–262 (BLAST detector), NIM A 373 ( 1996) 374-38 (PSI LADS reference)
  • Notes:
    • Bars would need to be cut and polished (Kent State?).
    • New PMTs are likely.
    • Primarily interested in the Ohio walls.
      • The LADS bars are trapezoidal; they can be stacked into planes by alternating the 'wedge' direction. Not even sure if they are available as well(?)
"BigBite" HAND
 32x   10 cm x 10  cm  x  100 cm
 32x   10 cm x 12.5cm  x  100 cm
 12x   10 cm x 15  cm  x  100 cm
 12x   15 cm x 25  cm  x  100 cm
 32x    2 cm x 11  cm  x  100 cm
  • Availability: Yes
  • Location: JLab ESB
  • Contact: Doug Higinbotham
  • Reference: Wermus Tech Note
  • Notes:
    • These are available now
    • Will likely need to replace most of the (3") PMTs


GEn E02-013 BigHAND neutron array
UVa:      100x     10 cm x 10 cm x 160 cm
Glasgow:   24x     10 cm x 20 cm x 180 cm
CMU:      120x      5 cm x 15 cm x 180 cm
  • Availability: ??? (there are plans to use the BigHAND array in Hall A)
  • Location: Bldg 64 (tent at NE corner of Accel area)
  • Contacts: Mixed: UVa (Donal Day), CMU (G. Franklin?), Glasgow (J. Annand); Bogdan, Albert (JLab)
  • Reference: BigHAND Geometry], General Documentation]
  • Notes:
    • These are still stored in the BigHAND cartridges in Bldg 64
    • PMT status TBD
    • At our 2013 collaboration meeting Donal mentioned the UVa bars are still available and are still under UVa ownership.


Existing Material at Kent State
8x  10 cm x 51 cm x 100 cm   (actual dimensions: 4" x 20" x 40")
3x  10 cm x 25 cm x 100 cm   (actual dimensions: 4" x 10" x 40")
  • Availability: Yes
  • Location: Kent State
  • Contacts: Bryon Anderson
  • Reference:
  • Notes:
    • Needs cutting and polishing
    • PMTs needed


Existing bars within Collaboration
SUNO    (Mostafa Elaasar):   ??x   1 cm x 10 cm x 100 cm
La Tech (Steve Wells):       ??x  10 cm x 10 cm x 100 cm
  • Availability: Yes
  • Notes:
    • Purchased as test bars with an eye to incorporation into full polarimeter
    • PMTs are included

Miscellaneous

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