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A new Differential Plunger to measure lifetimes of unbound states in tagged exotic nuclei
Mike Taylor
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Who’s Involved ?
- Manufacture and exploitation
- Host, technical expertise, manufacture and exploitation
- Design and technical expertise
- Project Lead, design, manufacture and exploitation
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1. Physics Motivation
2. Project Overview
3. Current Status
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DPUNS PhysicsInvestigation into the effect of deformation on proton emission rates
theomeas tt 2121
[1] Phys. Rev. Lett. 97, 162502 (2006)
theo),,( 42
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DPUNS Physics
[1] PRC 59, R2984 (1999), [2] PRC 61, 021304(R) (2000)
p11/2-
(15/2-)
(19/2-)953
863
612
151Lu
82(10) ms• Also, p decay, 16(1) μs from an unplaced isomeric state
[σ ~ 70μb]Protontagging
[1] [2]
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2. Project Overview
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Differential Plunger Technique
Beam
ReactionTarget
x
Degrader
12
V1 V2
E
Inte
nsity
[1] Z. Phys. A 334, 163 (1989)τ from Differential Decay Curve Method (DDCM)
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Beam
DPUNS @ JYFLTagging with GREAT
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Upstream End
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Motor• Range: 30mm/7μm
• Resolution: 20nm
• Voltage: < 50 V (c.f. ~1200V)
Piezo Motor and Actuator
Actuator• Resolution: 0.05 nm
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Gas windowDegraderTarget
Efficiency Improvement
Plunger RITU
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Gas windowDegraderTarget
Efficiency Improvement
Plunger RITU
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Downstream End
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Feedback Devices
TESA TT-20 & Probe• Range: ±5 mm
• Resolution: 0.1 μm
Motor:
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Target
Degrader
Actuator:
Beam
Cd 1
Feedback Devices
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3. Current Status
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Manufacturing Phase Completed
Purchased components acquired
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Testing Phase
• Vacuum tested: 1.7x10-5 bar
• Components: motor and μm probe
• Device stability
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Still To Do...
April/May •Component testing
June/July •Fully assemble and vacuum test
Aug/Sept •Ship to Jyväskylä
Oct/Nov •Beam test on MARA line
2012 •Commissioning and first campaign
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Thank You !D. M. Cullen and A. J. Smith
University of Manchester
P. M. Jones and P. NieminenUniversity of Jyväskylä
P. A. ButlerUniversity of Liverpool