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A new Differential Plunger to measure lifetimes of unbound states in tagged exotic nuclei

A new Differential Plunger to measure lifetimes of unbound states in tagged exotic nuclei. Mike Taylor. Who’s Involved ?. Project Lead, design, manufacture and exploitation. - Manufacture and exploitation. Host, technical expertise, manufacture and exploitation.

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A new Differential Plunger to measure lifetimes of unbound states in tagged exotic nuclei

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  1. A new Differential Plunger to measure lifetimes of unbound states in tagged exotic nuclei Mike Taylor

  2. Who’s Involved ? • Project Lead, design, manufacture and • exploitation - Manufacture and exploitation • Host, technical expertise, manufacture • and exploitation • Design and technical expertise

  3. Physics Motivation Project Overview Current Status

  4. DPUNS Physics Investigation into the effect of deformation on proton emission rates [1] Phys. Rev. Lett. 97, 162502 (2006)

  5. DPUNS Physics 151Lu [σ ~ 70μb] Proton tagging 953 (19/2-) 863 (15/2-) 612 11/2- 82(10) ms • Also, p decay, 16(1) μs • from an unplaced • isomeric state p [1] [2] [1] PRC 59, R2984 (1999), [2] PRC 61, 021304(R) (2000)

  6. Project Overview

  7. Differential Plunger Technique x Beam V1 V2 Reaction Target Degrader g2 g1 Intensity Eg τfrom Differential Decay Curve Method (DDCM) [1] Z. Phys. A 334, 163 (1989)

  8. DPUNS @ JYFL Tagging with GREAT Beam

  9. Upstream End

  10. Piezo Motor and Actuator • Motor • Range: 30mm/7μm • Resolution: 20nm • Voltage: < 50 V • (c.f. ~1200V) • Actuator • Resolution: 0.05 nm

  11. Efficiency Improvement Target Degrader Gas window Plunger RITU

  12. Efficiency Improvement Target Degrader Gas window Plunger RITU

  13. Downstream End

  14. Feedback Devices Motor: • TESA TT-20 & Probe • Range: ±5 mm • Resolution: 0.1 μm

  15. Feedback Devices Actuator: Beam Target Degrader

  16. Current Status

  17. Manufacturing Phase Completed Purchased components acquired

  18. Testing Phase • Vacuum tested: 1.7x10-5 bar • Components: motor and μm probe • Device stability

  19. Still To Do...

  20. Thank You ! D. M. Cullen and A. J. Smith University of Manchester P. M. Jones and P. Nieminen University of Jyväskylä P. A. Butler University of Liverpool

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