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| | == Polarimeter Documentation == | | == Polarimeter Documentation == |
| − | * Calibration of a neutron polarimeter in the 0.2–1.1 GeV region [NIMA557 (2006) 585-593]: [[File:JLAB-PHY-06-461.pdf]]
| + | [[Polarimeter Documentation | C-GEN Polarimeter Documentation]] |
| − | | |
| − | === C-GEN Polarimeter Design / Documentation ===
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| − | <noinclude>
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| − | * (18 Sept 2014) JT2go 3D model (based on working model in JLab CAD system; Contact: Paulo Medeiros)
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| − | ** [https://userweb.jlab.org/~brads/c-gen/JT2GoSetup_tcm1023-85455.exe JT2go viewer (Windows)]
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| − | ** [https://userweb.jlab.org/~brads/c-gen/HallC_layout_w_polarim-18Sep2014.jt Hall layout w/ mock-up of Magnets and "Plan B" detector using 160cm bars (JT file)]
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| − | ** Images extracted from the above JT file:
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| − | <gallery mode="packed-hover" heights="140">
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| − | File:top-with_scale-18Sep2014.jpg |''[[File:top-with_scale-18Sep2014.pdf]]''
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| − | File:top-with_scale_midplane_cut-18Sep2014.jpg |''[[File:top-with_scale_midplane_cut-18Sep2014.pdf]]''
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| − | File:side-isometric-18Sep2014.jpg |''[[File:side-isometric-18Sep2014.pdf]]''
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| − | File:side_isometric-midplane_cut-18Sep2014.jpg |''[[File:side_isometric-midplane_cut-18Sep2014.pdf]]''
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| − | File:side-isometric_no_mag1-18Sep2014.jpg |''[[File:side-isometric_no_mag1-18Sep2014.pdf]]''
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| − | File:side_isometric_no_mag2-18Sep2014.jpg |''[[File:side_isometric_no_mag2-18Sep2014.pdf]]''
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| − | File:top_isometric_midplane_cut-18Sep2014.jpg |''[[File:top_isometric_midplane_cut-18Sep2014.pdf]]''
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| − | File:top_zoomed-out-18Sep2014.jpg |''[[File:top_zoomed-out-18Sep2014.pdf]]''
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| − | </gallery>
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| − | | |
| − | [[File:side-isometric-18Sep2014-big.gif|upright=2.0|thumb|alt=C-GEn "Plan B" Polarimeter]]
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| − | === Possible scintillator hardware ===
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| − | ==== The "Plan B" design requires: ====
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| − | * Total: 136x 10 cm x 10 cm "thick" bars
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| − | 108 10 cm x 10 cm x 160 cm E counters (top + bottom)
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| − | 28 10 cm x 10 cm x 160 cm analyzer bars
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| − | * Total: 80x 1 cm x 10 cm "thin" bars
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| − | 52 1 cm x 10 cm x 160 cm dE (top + bottom)
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| − | 28 1 cm x 10 cm x 160 cm analyzer vetos
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| − | | |
| − | * All bars are double-ended readout.
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| − | ----
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| − | | |
| − | ==== Existing Scintillator Bars ====
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| − | ===== BLAST bars (some from PSI LADS detector) =====
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| − | Ohio walls: 16x 10 cm x 22.5 cm x 400 cm
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| − | LADS15: 28x 15 cm x 14.5 cm(*) x 160 cm
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| − | LADS20:· 28x 20 cm x 9.8 cm(*) x 160 cm
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| − | (*) bars are trapezoidal shaped; this is mid-point thickness
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| − | * Availability: '''Yes''' (needs to be shipped to Kent St/JLab)
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| − | * Location: BATES
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| − | * Contact: Michael Kohl
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| − | * 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)
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| − | * Notes:
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| − | ** Bars would need to be cut and polished
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| − | ** The LADS bars are trapezoidal; they can be stacked into planes by alternating the 'wedge' direction
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| − | ** Needs new PMTs
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| − | | |
| − | | |
| − | ===== "BigBite" HAND =====
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| − | 32x 10 cm x 10 cm x 100 cm
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| − | 32x 10 cm x 12.5cm x 100 cm
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| − | 12x 10 cm x 15 cm x 100 cm
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| − | 12x 15 cm x 25 cm x 100 cm
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| − | 32x 2 cm x 11 cm x 100 cm
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| − | * Availability: '''Yes'''
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| − | * Location: JLab ESB
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| − | * Contact: Doug Higinbotham
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| − | * Reference: [http://hallaweb.jlab.org/staff/doug/outreach/students/Summer2009/Dominik-Wermus-Paper.pdf Wermus Tech Note]
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| − | * Notes:
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| − | ** These are available now
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| − | ** Will likely need to replace most of the (3") PMTs
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| − | | |
| − | | |
| − | ===== GEn E02-013 BigHAND neutron array =====
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| − | UVa: 100x 10 cm x 10 cm x 160 cm
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| − | Glasgow: 24x 10 cm x 20 cm x 180 cm
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| − | CMU: 120x 5 cm x 15 cm x 180 cm
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| − | * Availability: '''???''' (there are plans to use the BigHAND array in Hall A)
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| − | * Location: Bldg 64 (tent at NE corner of Accel area)
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| − | * Contacts: Mixed: UVa (Donal Day), CMU (G. Franklin?), Glasgow (J. Annand); Bogdan, Albert (JLab)
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| − | * Reference: [http://hallaweb.jlab.org/experiment/E02-013/ND_Geometry.pdf BigHAND Geometry]], [http://hallaweb.jlab.org/experiment/E02-013/docs.html General Documentation]]
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| − | * Notes:
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| − | ** These are still stored in the BigHAND cartridges in Bldg 64
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| − | ** PMT status TBD
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| − | ** At our 2013 collaboration meeting Donal mentioned the UVa bars are still available and are still under UVa ownership.
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| − | | |
| − | | |
| − | ===== Existing Material at Kent State =====
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| − | 8x 10 cm x 51 cm x 100 cm (actual dimensions: 4" x 20" x 40")
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| − | 3x 10 cm x 25 cm x 100 cm (actual dimensions: 4" x 10" x 40")
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| − | * Availability: '''Yes'''
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| − | * Location: Kent State
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| − | * Contacts: Bryon Anderson
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| − | * Reference:
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| − | * Notes:
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| − | ** Needs cutting and polishing
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| − | ** PMTs needed
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| − | | |
| − | | |
| − | ===== Existing bars within Collaboration =====
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| − | SUNO (Mostafa Elaasar): ??x 1 cm x 10 cm x 100 cm
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| − | La Tech (Steve Wells): ??x 10 cm x 10 cm x 100 cm
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| − | * Availability: '''Yes'''
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| − | * Notes:
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| − | ** Purchased as test bars with an eye to incorporation into full polarimeter
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| − | ** PMTs are included
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| − | </noinclude>
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