Graeme Morgan 2014 Cap Congress Current Status of the Canadian Penning Trap Mass Spectrometer at CARIBU.

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Presentation transcript:

Graeme Morgan 2014 Cap Congress Current Status of the Canadian Penning Trap Mass Spectrometer at CARIBU

How are heavy elements formed? r-process thought to produce almost half of the elements heavier than Iron.

r-process J. Van Schelt – PhD Thesis 2012

Where do we come in? We can measure those masses!

Californium Rare Isotope Breeder Upgrade - CARIBU J. Van Schelt – PhD Thesis 2012 J. Clark and G. Savard/Int. Journal of Mass Spectrometry (2013) 81

Changes to CARIBU R. N. Wolf et. al./Nucl. Instr. and Methods in Physics Research A 686 (2012) 82

- Proposed measurements

How to Measure Masses

The Canadian Penning Trap Particles held by a quadrupole trapping potential along the B-field axis. Potential created by shaping the trap electrodes as two hyperboloids of revolution. J. Clark – PhD Thesis 2005

Ion Motion in Trap L. Brown and G. Gabrielse/Rev. Mod. Phys. 58 (1986) 233

J. Van Schelt – PhD Thesis 2012

Channeltron TOF Detection Linear Energy Magnetic field lines outside the Penning trap Ions ejected from the Penning trap Orbital Energy Time of Flight Method Figure by D. Lascar Isotopes examined during Summer Sr, 95Sr, 93Rb, 106Mo, 106Tc, 134I-m, 134I-g, 142I, 147Cs, 148Cs, 146La-m, 146La-g, 148Ba, 149Ba, 150Ba, 162Sa, 162Eu, 164Eu, 165Gd

CPT Detector Upgrade Replacing current Channeltron detector with a position sensitive MCP Enables phase-imaging ion- cyclotron resonance (PI-ICR) measurements

PI-ICR Measurements Ions from the Penning trap The position of the ion in the trap is projected onto the MCP when ejected. The orbital frequency of the ion’s motion is calculated from the phase change over time. S. Eliseev et. al./Phys. Rev. Lett. 110 (2013)

What do we gain?

CPT Collaboration P. Bertone, J.A. Clark, A. Perez Galvan, A.F. Levand, G. Savard A. Chaudhuri, G. Morgan, K.S. Sharma S. Caldwell, J. Van Schelt, M. Sternberg F. Buchinger, J.E. Crawford, G. Li, R. Orford D. Lascar, R. Segel A. Aprahamian, S. Marley, M. Mumpower, A. Nystrom, N. Paul, K. Siegl, S. Y. Strauss, R. Surman

S. Eliseev et. al./ Appl. Phys. B 114 (2014) 107