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CERN-ISCC Meeting “ Storage Ring Facility at HIE-ISOLDE ”. Klaus Blaum 3rd Nov 2011.

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Cern iscc meeting storage ring facility at hie isolde

CERN-ISCC Meeting“Storage Ring Facility atHIE-ISOLDE”

Klaus Blaum

3rd Nov 2011


Cern iscc meeting storage ring facility at hie isolde

Important steps:1) [email protected] Workshop at the Max-Planck-Institute for Nuclear Physics 28.-29.10.2010 (34 participants)2) Presentation of the [email protected] LOI at the CERN INTC- Meeting 02.02.2011 (about 60 coauthors)3) Presentation of the scientific (Yuri Litvinov) and technical Fredrik Wenander) part of the [email protected] Project at the STORI 2011 conference4) [email protected] Meeting at MPIK in order to discuss the open questions related to the preparation of the TDR for the INTC meeting (28.10.2011)5) TDR for the [email protected] project almost ready for submission, which is planned for the February 2012 INTC Meeting (> 120 coauthors, about 20 institutions)


Cern iscc meeting storage ring facility at hie isolde

Presently 125 pages!


Cern iscc meeting storage ring facility at hie isolde

The heavy ion

storage ring TSR

at MPIK Heidelberg

TSR Max

Planck Institute

Heidelberg

Circumference: 55m

[email protected]

LOI Jan 2011

TDR in progress

(K. Blaum, Y. Litvinov)


Cern iscc meeting storage ring facility at hie isolde

  • Some technical details:

  • Typical storage energy for 12C6+: E = 72 MeV 6 MeV/u

  • Vacuum: ~10-11 mbar

  • Acceptance ellipse of the TSR: 120 mm mrad well suited for REX-ISOLDE

  • Multiturn injection  mA of stored beam possible

  • Electron cooler  transverse cooling time of ~1s

  • RF acceleration and deceleration possible

  • Typical storage times:p @ 21 MeV: 60 h

  • 9Be1+ @ 7 MeV: 16 s12C6+ @ 73 MeV: 7470 s

  • 35Cl17+ @ 202 MeV: 318 s

  • 197Au51+ @ 710 MeV: 23 s


Cern iscc meeting storage ring facility at hie isolde

Physics cases discussed in

the [email protected] TDR

  • Half-life measurements of 7Be in different atomic charge states

  • Capture reactions for astrophysical p-process

  • Nuclear astrophysics through transfer reactions

  • Nuclear structure through transfer reactions

  • Long-lived isomeric states

  • Atomic effects on nuclear half-lives

  • Di-electronic recombination on exotic nuclei

  • Atomic physics experiments

  • Neutrino physics

  • (Laser spectroscopy experiments in the storage ring)


Cern iscc meeting storage ring facility at hie isolde

Two possible locations at ISOLDE for the ring

10m restriction

F/CH border

F

CH

Courtesy of Erwin Siesling


Cern iscc meeting storage ring facility at hie isolde

Jura (west) side

24.6m

23.3m

Building costs: ~ 3MCHF

8


Cern iscc meeting storage ring facility at hie isolde

Jura (west) side

23.3m

24.6m

3m

Proposed layout to fit the TSR at the west side:

- Installation above the CERN infrastructure-tunnel (not negotiable to move the tunnel: houses essential CERN signals and infrastructure)

- Tilted beamline coming up from the machine

9


Cern iscc meeting storage ring facility at hie isolde

Surface & Weight

Total surface TSR floor: 24.6x23.3m=573m2

of which 20x20m (400m2) reserved for the ring (final position of the ring within the building to be defined)

TSR floor approx . 3m above Hie Linac floor

Level of the center of beam at 1.77m above TSR floor

12m

Total surface available basement: 12mx24.6m=295m2

to house power-supplies and additional racks (total 29m length floor space for the TSR equipment and 7m for the e-target equipment + 10 standard 19’’ racks and ECOOL HV cage 4x4m2)

10


Cern iscc meeting storage ring facility at hie isolde

Further information:Detailed estimation of the costs and manpowerrequirements are in preparation. preliminary values by MPIK exist; information from CERN neededFunding requests to the different agencies are under discussion (e.g. UK) Ideal time schedule: Building ready end of 2013,move of the ring in 2014, commissioning and start in 2015.Financial support by the ISOLDE Collaboration is needed in order to realize this project.


Some speculations on the ec decay of 7 be

Some speculations on the EC-decay of 7Be

7Be + e- 7Li + ne

7Be + p  8B + g

S. Kappertz et al., AIP Conf. Proc. Vol. 455 (1998) 110

A.V. Gruzinov, J.N. Bahcall, ApJ 490 (1997) 437

Negative magnetic moment of 7Be

Ionization of 7Be in the Sun can be ~ 20-30 %

[email protected] would be the best place to perform these experiments!

Y. Litvinov, MPIK and GSI


Reaction studies for astrophysical applications

Reaction Studies for Astrophysical Applications

Particle detectors

Gas jet

ESR

Measurements of (p,) or (α,) rates in the Gamow window of the p-process in inverse kinematics.

  • Advantages:

  • Applicable to radioactive nuclei

  • Detection of ions via in-ring particle detectors (low background, high efficiency)

  • Knowledge of line intensities of product nucleus not necessary

  • Applicable to gases

Proof-of-principle experiment:

96Ru (p,g)97Rh

Similar experiments possible at [email protected]!


Preliminary result @ 11 mev upper limit

Preliminary result @ 11 MeV – upper limit

Ignore (p,n) component –

resulting in an upper limit

for (p,)

σPG ~ 4.0 mb

Non-smoker: 3.5 mb

Similar experiments with radioactive beams feasable at HIE-ISOLDE + TSR.

HIE-ISOLDE energy range fits perfectly!


Transfer reaction studies physics cases

Transfer Reaction Studies: Physics cases

  • Transfer around the island of inversion

  • 32Mg(d,p) T1/2 = 86 ms, 3103pps

  •  not possible (half lives)

  • Transfer towards 78Ni

  • 68Ni(d,p) T1/2 = 29 s, 5104 pps

  • Limit given by atomic charge exchange

  • Transfer around 100Sn

  • 102Sn(p,d) T1/2 = 4.5 s, 102 – 103 pps ??

  • Could be feasible! But probably notat 10 MeV/u

  • Transfer around 132Sn

  • 134Sn(d,p) T1/2 = 1 s, 104 pps ?

R. Raabe, K.U. Leuven


Cern iscc meeting storage ring facility at hie isolde

Transfer Reaction Studies: Physics cases

  • Shape coexistence in n-poor Pb region

  • Still unique @ ISOLDE(Bi, Tl never post-accelerated so far)

  • Beam losses??

1E2

1E3

1E2

5E3

5E4

2E5

1E6

2E6

1E3

1E4

1E5

1E6

1E2

3E3

1E4

7E4

1E5

2E5

R. Raabe, K.U. Leuven


Nuclear excitation by electron capture

an as-yet unobserved process

Nuclear Excitation by Electron Capture

difficulty: NEEC

competes with much

stronger, but non-

resonant process of

radiative capture:

X-ray emitted,

instead of nuclear

excitation.

electrons nucleons

electrons nucleons

- nuclear analogue of dielectronic recombination

- inverse of electron conversion

[A. Palffy et al., Phys. Rev. Lett. 99 (2007) 172502]

Proposed candidate 93Mo

P. Walker, Surrey


Cern iscc meeting storage ring facility at hie isolde

Neutrino physics studies

  • Ideal test facility for the accumulation and storage of 6He


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