Canada's National Laboratory for Particle and Nuclear Physics
Laboratoire national canadien pour la recherche en physique nucléaire
et en physique des particules

Low-Background In-Trap
Decay Spectroscopy withTITAN at TRIUMF

Kyle G. Leach | TITAN | TRIUMF, SFU

Owned and operated as a joint venture by a consortium of Canadian universities via a contribution through the National Research Council Canada
Propriété d’un consortium d’universités canadiennes, géré en co-entreprise à partir d’une contribution administrée par le Conseil national de recherches CanadaNeutrinoless ββ Decay2(T 01 /2ν )−1=G0 ν (Qβ β , Z )( M 0 ν ) 2 mββ

GERDA
June 6, 2014

D. Frekers, J. Dilling, and I. Tanihata, Can. J. Phys. 85, 57 (2007)
Low-Background In-Trap Decay Spectroscopy with TITAN at TRIUMF

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The TRIUMF-ISAC Facility

J. Dilling, R. Kruecken, and G. Ball, Hyper. Inter. 225, 1 (2014)
P. Bricault et al., Nucl. Instr. Meth. Phys. B 126, 231 (1997)
M. Dombsky et al., Rev. Sci. Instr.. 71, 978 (2000)
June 6, 2014

Low-Background In-Trap Decay Spectroscopy with TITAN at TRIUMF3

TRIUMF's Ion Trap for Atomic and Nuclear Science (TITAN)

EBITCPET

Electron Beam Ion Trap

Cooler Penning Trap

A. Lapierre et al, NIM A 624, 54(2010)

RFQ

Coolerand Buncher

Bradbury–Nielsen Gate
T. Brunner, et al, IJMS, 309, 97 (2009)

T. Brunner et al, NIM A 676, 32 (2012)

Beam From
ISAC
June 6, 2014

MPETPrecision Measurement Trap
M. Brodeur et al, IJMS, 310, 20(2012)

J. Dilling et al., Nucl. Instr. Meth. Phys. B 204, 492 (2003)
J. Dilling et al., Int. Journ. Mass Spec. 251, 198 (2006)
Low-Background In-Trap Decay Spectroscopy with TITAN at TRIUMF

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Decay Spectroscopy with TITAN
To CPET/MPETISAC Beam
June 6, 2014

K.G. Leach, A. Grossheim, A. Lennarz et al., arXiv:1405.7209 (2014)
A. Lennarz, T. Brunner et al., Hyper. Inter. 225, 157 (2014)
T. Brunner, A. Lapierre et al., Eur. Phys. J. A 49, 142 (2013)

Low-Background In-Trap Decay Spectroscopy with TITAN at TRIUMF

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Decay Spectroscopy with TITAN

June 6, 2014

Low-Background In-Trap Decay Spectroscopy with TITAN at TRIUMF

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Ion-Bunch Confinement

K.G. Leach, A. Grossheim, A. Lennarz, et al., arXiv:1405.7209 (2014)
June 6, 2014

Low-Background In-Trap Decay Spectroscopy with TITAN at TRIUMF

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Decay Spectroscopy on Trapped Radioactive Ions

• Up to 6 T field with a 7 cm trapping volume•Up to 500 mA e-beam•7, 5 mm thick Si(Li) detectors•1 LeGe detector for monitoring
K.G. Leach, A. Grossheim, A. Lennarz, et al., arXiv:1405.7209 (2014)
June 6, 2014

Low-Background In-Trap Decay Spectroscopy with TITAN at TRIUMF

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Decay Spectroscopy on Trapped Radioactive Ions

7654June 6, 2014

Low-Background In-Trap Decay Spectroscopy with TITAN at TRIUMF

9EBIT Ion-bunch Injection

Courtesy R. Klawitter
June 6, 2014

Low-Background In-Trap Decay Spectroscopy with TITAN at TRIUMF

10EBIT Ion-bunch Injection

Courtesy R. Klawitter
June 6, 2014

Low-Background In-Trap Decay Spectroscopy with TITAN at TRIUMF

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EBIT Ion-bunch Injection

Inner-most collector side electrode potential is lowered for injection
Courtesy R. Klawitter
June 6, 2014

Low-Background In-Trap Decay Spectroscopy with TITAN at TRIUMF

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EBIT Ion-bunch Injection

Inner-most collector side electrode potential is raised for axial
confinement of the ion bunch
Courtesy R. Klawitter
June 6, 2014

Low-Background In-Trap Decay Spectroscopy with TITAN at TRIUMF

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EBIT Ion-bunch Injection

Inner-most collector side electrode potential is lowered again,
and bunch is removed from the trap
Courtesy R. Klawitter
June 6, 2014

Low-Background In-Trap Decay Spectroscopy with TITAN at TRIUMF

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A=124 On-Line Commissioning

A. Lennarz, A. Grossheim, K.G. Leach et al., PRL submitted (2014)
June 6, 2014

Low-Background In-Trap Decay Spectroscopy with TITAN at TRIUMF

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116

In On-Line Commissioning•X-rays characteristic of EC•116In:116Inm1:116Inm2 -- 1:100:10•Significant backgrounds from β- decay are
difficult to deal with
•Space-charge limit of RFQ ~105
C. Wrede et al., Phys. Rev. C 87, 031303(R) (2013)
June 6, 2014

Low-Background In-Trap Decay Spectroscopy with TITAN at TRIUMF

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Multiple Ion-bunch Stacking

Ions are trapped, and in charge-state q>2+Courtesy R. Klawitter
June 6, 2014

Low-Background In-Trap Decay Spectroscopy with TITAN at TRIUMF

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Multiple Ion-bunch Stacking

Inner-most collector side electrode potential is not loweredto the same level as injection/extraction

Subsequent ion bunches are rapidly injected, where they are quickly
Charge-bred, and remain trapped
Courtesy R. Klawitter
June 6, 2014

Low-Background In-Trap Decay Spectroscopy with TITAN at TRIUMF

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Multiple Ion-bunch Stacking

700 injections

1300 injections

2000 injections

Ion bunches from RFQ injected every 0.015 s
24 keV Kα from 116Inm2 (t1/2=2.18 s)•Constant ion bunch injection•Max after 700 bunches (~106-107 ions, for RFQ space charge of <105)•e-beam: 100 mA, 1.7 keV - space charge limit is about 109e
June 6, 2014

Low-Background In-Trap Decay Spectroscopy with TITAN at TRIUMF

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116

In Decay Spectroscopy

June 6, 2014

Low-Background In-Trap Decay Spectroscopy with TITAN at TRIUMF

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116

In Decay Spectroscopy

June 6, 2014

Low-Background In-Trap Decay Spectroscopy with TITAN at TRIUMF

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Conclusions•An ion-trap decay spectroscopy tool has been constructed andcomissioned with TITAN at TRIUMF•Consists of:•Up to 6 T open-access ion trap•500 mA e-gun•Seven 5mm thick planar Si(Li) detectors•Have achieved trapping times of minutes with no ion losses•Demonstrated multiple-injection technique (116In decay)•Plan to perform first physics measurement on 110Ag this fall
June 6, 2014

Low-Background In-Trap Decay Spectroscopy with TITAN at TRIUMF

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Canada's National Laboratory for Particle and Nuclear Physics
Laboratoire national canadien pour la recherche en physique nucléaireet en physique des particules

Thank You!
Merci!
HarvardStanford U.

Notre Dame

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