Physik des Antiprotonenbeschleunigers HESRADUC and ELENA Meeting

28-29 September 2011

Sept. 29, 2011 Rudolf Maier

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Outline

IntroductionHESR: High-Energy Storage RingPrototyping of HESR components Beam Experiments at the Cooler Synchrotron COSYSummary

Contribution to ELENA

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Facility for Antiproton and Ion Research

p-Linac

HESR

SIS18SIS100

CR/RESR

AntiprotonsProduction Target

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HESR design driven by the requirements of PANDA:

• Antiprotons with 1.5 GeV/c ≤ p ≤ 15 GeV/c• High luminosity: 2·1032 cm-2s-1

- Thick targets: 4·1015 cm-2

• High momentum resolution: Δp/p ≤ 4·10-5

- Phase space cooling

• Long beam life time: >30 min

Criteria for the Layout of the HESR

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HESR with PANDA and Electron Cooler

HESR Consortium: Germany (Jülich, GSI, Mainz), Romania and Slovenia

HESR COSY575 m Circumference 184 m

1.5 – 15 GeV/c Momentum 0.3 – 3.7 GeV/c

up to 9 GeV/c Electron Cooling up to 0.5 GeV/cFull range Stochastic Cooling 1.5 – 3.7 GeV/c

HESRCOSY

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HESR Prototyping and Tests

WASA

2 MeV e-Cooler

Barrier Bucket Cavity

Stochastic Cooling

Residual Gas Profile Monitor

Pellet Target

100 KeV e-Cooler

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Example: Beam Cooling with WASA Pellet Target

a) Injected beamb) Beam heated by targetc) + stochastic coolingd) + barrier bucket

0

1 10-7

2 10-7

3 10-7

4 10-7

5 10-7

6 10-7

1.5368 1.5369 1.537 1.5371 1.5372 1.5373

Par

ticle

Den

sity

(arb

. uni

ts)

f [GHz]

a) b)

d)

c)

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Hadron Physics with Antiprotons

Sophisticated accelerators Forefront beam cooling Internal targets RF manipulation techniques

Summary

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Contribution to ELENA

IKP at the research center Juelich has a long

standing tradtion of significant contributions to the facility and physics program at the CERN-AD.

We fully support constructing the ELENA ring to increase the phase space density of the cooled antiprotons.

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Contribution to ELENA

In the application phase of ELENA we have agreed to contribute the equivalent of 3 person-years to the construction efforts, and now that ELENA has been approved, we remain dedicated to this pledge.

Currently our electronic and mechanical workshops are fully booked, however we are happy to discuss workpackages that match the time schedules, as well as other contributions that require other resources.

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Contribution to ELENA

H- Source

Running H- Sources since 1995 for Injection into Cyclotron

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mbar

Beam intensity2 Spin FlipsDAQ stoppedTarget off

Pressure at filter target

Pressure at deuterium target

16000s of spin-filtering

Total trigger rate

2500s of polarisation measurement

COSY Cycle for spin-filteringat 49.3 MeV