Proton Beam for JHF neutrino · JHF will produce about 0.75 MW 50 GeV proton beam. Primary proton...

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2002/3/18 NBI02@CERN Proton Beam for JHF neutrino A. K. Ichikawa Kyoto University Y. Noumi, KEK J. Doornbos, TRIUMF

Transcript of Proton Beam for JHF neutrino · JHF will produce about 0.75 MW 50 GeV proton beam. Primary proton...

Page 1: Proton Beam for JHF neutrino · JHF will produce about 0.75 MW 50 GeV proton beam. Primary proton beam will be bent 80 degrees and transported to the target through super-conducting

2002/3/18 NBI02@CERN

Proton Beam for JHF neutrino

A. K. IchikawaKyoto University

Y. Noumi, KEKJ. Doornbos, TRIUMF

Page 2: Proton Beam for JHF neutrino · JHF will produce about 0.75 MW 50 GeV proton beam. Primary proton beam will be bent 80 degrees and transported to the target through super-conducting

OverviewPrimary proton beamline

Preparation section

Arc R=106m

Final Focusing Section

×

Fast extraction (0.3Hz, 5µs)

ε= 6π mm.mr

Beam power = 0.75 MW (3.3E14 ppp 50 GeV).

Page 3: Proton Beam for JHF neutrino · JHF will produce about 0.75 MW 50 GeV proton beam. Primary proton beam will be bent 80 degrees and transported to the target through super-conducting

Preparation sectionMake the matching with the Arc.

Consists of normal conducting magnets

Total Length : 52.3m Tight spacing

3.84 degrees bending

Page 4: Proton Beam for JHF neutrino · JHF will produce about 0.75 MW 50 GeV proton beam. Primary proton beam will be bent 80 degrees and transported to the target through super-conducting

monitor

ε=24πCollimator/shield

Matching Point10cm

10cm

V

H

Acceptance : 60π mm.mrad (cf Acc. design = 6π mm.mr)

Waist mode & normal mode.

Page 5: Proton Beam for JHF neutrino · JHF will produce about 0.75 MW 50 GeV proton beam. Primary proton beam will be bent 80 degrees and transported to the target through super-conducting

Arc

FODO lattice. 10, about 80 degrees bending×

B

B

QQ

Bends by 3m long 4 Tesla superconducting magnet.

(about 4 Tesla)

+ 1m long Quad-superconducting magnet.

Bore : 180mmφ or 220mmφ

To prevent the quenching,

the beam size and halo should be small.

Page 6: Proton Beam for JHF neutrino · JHF will produce about 0.75 MW 50 GeV proton beam. Primary proton beam will be bent 80 degrees and transported to the target through super-conducting

2cm Y

X

Waist mode

Page 7: Proton Beam for JHF neutrino · JHF will produce about 0.75 MW 50 GeV proton beam. Primary proton beam will be bent 80 degrees and transported to the target through super-conducting

2cm

X

YNormal Mode

Page 8: Proton Beam for JHF neutrino · JHF will produce about 0.75 MW 50 GeV proton beam. Primary proton beam will be bent 80 degrees and transported to the target through super-conducting

Beam halo study using Geant

60π mm.mr beam1,000 events

100π mm.mr beam500 protons

Preparation section

Arc

Magnet geometry and field are set via data file.

applicable to different beamlines.

Page 9: Proton Beam for JHF neutrino · JHF will produce about 0.75 MW 50 GeV proton beam. Primary proton beam will be bent 80 degrees and transported to the target through super-conducting
Page 10: Proton Beam for JHF neutrino · JHF will produce about 0.75 MW 50 GeV proton beam. Primary proton beam will be bent 80 degrees and transported to the target through super-conducting
Page 11: Proton Beam for JHF neutrino · JHF will produce about 0.75 MW 50 GeV proton beam. Primary proton beam will be bent 80 degrees and transported to the target through super-conducting

Target Station

OAB 2,2.5,3degree

NBB

Side View

Off Axis Beam

Plan to change the axis by moving horns or w/ dipole after horns.

NBB for ν-interaction study : 6 degrees momentum selection

Page 12: Proton Beam for JHF neutrino · JHF will produce about 0.75 MW 50 GeV proton beam. Primary proton beam will be bent 80 degrees and transported to the target through super-conducting

Total Length=37.5m

120mmφ 200mφ200mφ

120mmφ

4m

3cmφ@target

Applicable to 6π mm.mr<ε<24π mm.mr

Vertical bending magnets

Arc section

Page 13: Proton Beam for JHF neutrino · JHF will produce about 0.75 MW 50 GeV proton beam. Primary proton beam will be bent 80 degrees and transported to the target through super-conducting

SummaryJHF will produce

about 0.75 MW 50 GeV proton beam.

Primary proton beam will be bent 80 degrees and transported to the target through super-conducting magnets.

Optics design was done to get the beam size as small as possible.

Preparation & Arc : Start MC study to scrape halo w/ collimators.

Focusing section & Target station

Changeable OAB & Limited NBB

3cmφ at the target.


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