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A Magnetic Detector for MINERvA

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Fe Torroids, strong Toroidal Magnetic Field. Scintillator strips ... Toroid: D = 3 m. 256 planes, 100 strips = 96 trips = 24576 strips. 384 M64s ... – PowerPoint PPT presentation

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Title: A Magnetic Detector for MINERvA


1
A Magnetic Detector for MINERvA
  • Modular Structure
  • Fe Torroids, strong Toroidal Magnetic Field
  • Scintillator strips
  • WLS fiber readout with Hamamatsu M64
  • MINOS ND Electronics

MINERVA Collaboation meeting, June 27-28, 2003
G. Tzanakos, University of Athens
2
DETECTOR CONCEPT
Scintillator
Fe
3
BASIC TOROIDAL MODULE
4
Toroidal Magnetic Detector (Type A)
5
Toroidal Magnetic Detector (Type B)
6
Example
7
Example of type A
8
Example (Cont)
  • Thin Fe down to 2 mm. Doable (J. Nelson).
  • Assume d 4 mm ( ? X0/4)
  • Strips 3 cm x 1cm x 300 cm
  • Target mass 3.0 ton ( 1.5 m dia x 2 m)
  • Toroid D 3 m
  • 256 planes, 100 strips gt 96 trips gt 24576
    strips
  • 384 M64s
  • Fe 200 kg/plane gt ? 50 ton total

9
Example (Cont)
10
Example (Cont)
Section Target(ton) Magnet(tons) Weight/plan
e (Kg) S1 1.81 7.12
140 S2 1.02 9.62
166 S3 0.45 11.40
185 S4 0 12.82
200 Total 3.28 40.96 Grand
Total 44 tons
11
Example (Cont)
  • Energy Resolution for showers ?E/E ? 0.2 ?(t/E)
  • (from MINOS CalDet ?E/E ? 0.23/?(E))
  • Here t 0.4/1.76 gtgt ?E/E ? 10/ ?(E)
  • Spatial Resolution/plane ?x ? 1 cm (? 3/
    ?12)
  • B 15 KG gt 57 cm path in Fe to tell the sign
    of charge
    ( ?m ? 3?c)

12
Next Steps
  • Model in GEANT
  • Generate neutrino events, study characteristics
    of QE, SP, ?0 production, DIS
  • Event Display could be very instructive.
  • Study spatial resolution.
  • Study virtues of this magnetic detector vs no
    field
  • Get a realistic conceptual design
  • Get costs
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