Low-noise low-mass front end electronics for low-background physics experiments using germanium detectors

Barton, Paul; Luke, P.N.; Amman, M.; Chan, Y. D.; Detwiler, J. A.; Loach, J. C.; Martin, R. D.; Poon, A. W. P.; Tindall, C.; Vetter, K.

doi:10.1109/nssmic.2011.6154397

Cited by 20 publications

(22 citation statements)

References 4 publications

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“…Signals from the PPC detectors are amplified and shaped by a custom low-noise resistive-feedback preamplifier with a measured equivalent noise charge of ∼85 eV in Gedetector-equivalent FWHM resolution [19]. The amplifier provides low-gain and high-gain outputs that are digitized separately by a custom 14-bit 100 MHz VME-based digitizer designed for the GRETINA experiment [20].…”

mentioning

confidence: 99%

New Limits on Bosonic Dark Matter, Solar Axions, Pauli Exclusion Principle Violation, and Electron Decay from the Majorana Demonstrator

Abgrall¹,

Arnquist²,

Avignone³

et al. 2017

Phys. Rev. Lett.

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We present new limits on exotic keV-scale physics based on 478 kg d of Majorana Demonstrator commissioning data. Constraints at the 90% confidence level are derived on bosonic dark matter (DM) and solar axion couplings, Pauli exclusion principle violating (PEPV) decay, and electron decay using monoenergetic peak signal-limits above our background. Our most stringent DM constraints are set for 11.8 keV mass particles, limiting gAe < 4.5 × 10 −13 for pseudoscalars and α ′ α < 9.7 × 10 −28 for vectors. We also report a 14.4 keV solar axion coupling limit of g eff AN × gAe < 3.8 × 10 −17 , a 1 2 β 2 < 8.5 × 10 −48 limit on the strength of PEPV electron transitions, and a lower limit on the electron lifetime of τe > 1.2 × 10 24 yr for e − → invisible.PACS numbers: 95.35.+d

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mentioning

confidence: 99%

New Limits on Bosonic Dark Matter, Solar Axions, Pauli Exclusion Principle Violation, and Electron Decay from the Majorana Demonstrator

Abgrall¹,

Arnquist²,

Avignone³

et al. 2017

Phys. Rev. Lett.

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“…The previous lowest noise performance of this crystal with a low mass JFET front end was 85 eV-FWHM as indicated in the ENC curve from Ref. [24]. The primary factor responsible for this improvement was the decreased capacitance of detector and FET, each about 40% to 50% of their previous values.…”

Section: Electronic Noisementioning

confidence: 71%

Ultra-low noise mechanically cooled germanium detector

Barton

Amman

Martin

et al. 2016

Nuclear Instruments and Methods in Physics Research Section A:

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Low capacitance, large volume, high purity germanium (HPGe) radiation detectors have been successfully employed in lowbackground physics experiments. However, some physical processes may not be detectable with existing detectors whose energy thresholds are limited by electronic noise. In this paper, methods are presented which can lower the electronic noise of these detectors. Through ultra-low vibration mechanical cooling and wire bonding of a CMOS charge sensitive preamplifier to a sub-pF p-type point contact HPGe detector, we demonstrate electronic noise levels below 40 eV-FWHM.

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“…The front-end boards use a design developed for the MAJORANA DEMONSTRATOR, called low-mass front-ends (LMFEs). The LMFEs are charge-sensitive amplifiers that use a resistive feedback design [5]. A charge-injection line is provided to allow characterization and monitoring of the LMFEs by external pulsers.…”

Section: Low-mass Front-end Boardsmentioning

confidence: 99%

Low background signal readout electronics for the MAJORANA DEMONSTRATOR

Guinn¹,

Abgrall²,

Arnquist³

et al. 2015

AIP Conference Proceedings

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The MAJORANA Collaboration will seek neutrinoless double beta decay (0νβ β ) in 76 Ge using isotopically enriched p-type point contact (PPC) high purity Germanium (HPGe) detectors. A tonne-scale array of HPGe detectors would require background levels below 1 count/ROI-tonne-year in the 4 keV region of interest (ROI) around the 2039 keV Q-value of the decay. In order to demonstrate the feasibility of such an experiment, the MAJORANA DEMONSTRATOR, a 40 kg HPGe detector array, is being constructed with a background goal of < 3 counts/ROI-tonne-year, which is expected to scale down to < 1 count/ROI-tonne-year for a tonne-scale experiment. The signal readout electronics, which must be placed in close proximity to the detectors, present a challenge toward reaching this background goal. This talk will discuss the materials and design used to construct signal readout electronics with low enough backgrounds for the MAJORANA DEMONSTRATOR. Keywords: neutrinoless double beta decay, germanium detector, low background electronics arXiv:1506.04279v1 [physics.ins-det] 13 Jun 2015 FIGURE 1. The configuration of the MAJORANA DEMONSTRATOR, with both cryostats placed inside of the shielding.

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Low-noise low-mass front end electronics for low-background physics experiments using germanium detectors

Cited by 20 publications

References 4 publications

New Limits on Bosonic Dark Matter, Solar Axions, Pauli Exclusion Principle Violation, and Electron Decay from the Majorana Demonstrator

New Limits on Bosonic Dark Matter, Solar Axions, Pauli Exclusion Principle Violation, and Electron Decay from the Majorana Demonstrator

Ultra-low noise mechanically cooled germanium detector

Low background signal readout electronics for the MAJORANA DEMONSTRATOR

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