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Super BigBite concepts Bogdan Wojtsekhowski, JLab Physics requirements Some experiments Layout for the GEP-15 Proposed spectrometer Detector configuration.

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Presentation on theme: "Super BigBite concepts Bogdan Wojtsekhowski, JLab Physics requirements Some experiments Layout for the GEP-15 Proposed spectrometer Detector configuration."— Presentation transcript:

1 Super BigBite concepts Bogdan Wojtsekhowski, JLab Physics requirements Some experiments Layout for the GEP-15 Proposed spectrometer Detector configuration Expected parameters Stages of implementation

2 Physics requirements Requirements: Solid angle - > 20 msr Scattering angle deg. Momentum range GeV/c Generic experiments to consider: Inclusive (e,e)- pol DIS Exclusive (e,eN)- GEP/GMP Semi-inclusive (e,eh)- SIDIS

3 Some of Experiments GMN with 6 GeV beam (Q 2 up to 8 GeV 2 ) Many experiments for 11 GeV beam: GEP - unique kinem. correlation -> L ~ A1n/d2n; A1p/dp; Transversity (e,e ) and (e,eK +/- ) FFs with polarized target - GEN, GEP

4 GEP-15 layout

5 Design considerations Vertical bending Detector should be behind magnetic field Compact beam spot on the target Simple dipole is the best for large momentum bite Field integral and bend angle vs detector resolution Progress in tracking detector technology

6 Proposed Spectrometer Magnet of 100 tons with aperture 46 cm x 122 cm full 3 Tesla-meter field integral Detector package:- GEM trackers resolution: 0.07 mm - Calorimeter based trigger > 1 GeV - Lead-glass PID for electron - Fast RICH from HERMES for,K How to put a wide magnet at 10 o angle near the target? Iron yoke is cut off to allow for the beam pipe!

7 Small angle concept

8 Layout of SuperBigBite RICH Preshower Shower 2-nd arm

9 Parameters Momentum acceptance at full field - 2 GeV/c and higher Momentum resolution ~ 0.5% for 8 GeV/c Solid angle at 14 degree is 55 msr (72 from pivot to yoke) Solid angle has aspect ratio 1:2.5 Angle resolution of 0.3 mrad Vertex resolution of 1 mm Target length 40 cm Simple optics, flat acceptance - perfect for terms like sin2 mrad msr

10 The 48D48 magnet at BNL 100 tons, 18.5 x 48 x 48 field volume

11 GEM base tracker Rate capability ~ 10 kHz/mm 2

12 Best PID: fast RICH -like in HERMES Sensitive area ~ 60x200 cm 2 viewed with 1934 PMTs

13 Plans Development will be driven/funded by the GEP-15 collaboration Components reused are a magnet and both calorimeters Proposal GEP/GMP (GEP-15) is submitted to the PAC32 Proposal GMN/GMP is under preparation to the next PAC GMN with the magnet - before 2011 at 50% field ( 1/4 power ) Support stand and full power for the magnet (refurbished BNLs) Construction of the tracking detectors - BIG NEW! I - 10x10 cm prototype, II- 40x140 cm prototype Francos collaboration: INFN+Glasgow+UVA+FIU+JLab Reconstruction of the hadron calorimeter - W&M+Dubna More proposals are under development for 12 GeV PACs Possible second arm magnet for the J/


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