Metallic magnetic calorimeters

Fleischmann, A.; Gastaldo, L.; Kempf, Sebastian; Kirsch, A.; Pabinger, A.; Pies, C.; Porst, Jan‐Patrick; Ranitzsch, P. C.-O.; Schäfer, Sönke; Seggern, Falk von; Wolf, Tamar; Enss, C.; Seidel, G. M.

doi:10.1063/1.3292407

Cited by 94 publications

(87 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These detectors can be classified on the basis of the temperature sensor. Within the ECHo experiment, low temperature metallic magnetic calorimeters (MMCs) will be used [939]. The spectral resolving power of a state of the art MMCs for soft X-rays is above 3000.…”

Section: Electron Capture Experiments (Author: L Gastaldo)mentioning

confidence: 99%

“…In low temperature micro-calorimeters the relatively small energy release in electron capture processes leads to an increase of temperature, which is measured by very sensitive thermometers. For the ECHo experiment, low temperature metallic magnetic calorimeters [939] will be used. These detectors are also suitable to be used for the calorimetric measurement of the electron capture spectrum of a large variety of other nuclides.…”

Section: Electron Capture Experiments (Author: L Gastaldo)mentioning

confidence: 99%

See 1 more Smart Citation

A White Paper on keV sterile neutrino Dark Matter

Adhikari

Agostini

et al. 2017

J. Cosmol. Astropart. Phys.

Self Cite

380

316

View full text Add to dashboard Cite

Abstract. We present a comprehensive review of keV-scale sterile neutrino Dark Matter, collecting views and insights from all disciplines involved -cosmology, astrophysics, nuclear, and particle physics -in each case viewed from both theoretical and experimental/observational perspectives. After reviewing the role of active neutrinos in particle physics, astrophysics, and cosmology, we focus on sterile neutrinos in the context of the Dark Matter puzzle. Here, we first review the physics motivation for sterile neutrino Dark Matter, based on challenges and tensions in purely cold Dark Matter scenarios. We then round out the discussion by critically summarizing all known constraints on sterile neutrino Dark Matter arising from astrophysical observations, laboratory experiments, and theoretical considerations. In this context, we provide a balanced discourse on the possibly positive signal from X-ray observations. Another focus of the paper concerns the construction of particle physics models, aiming to explain how sterile neutrinos of keV-scale masses could arise in concrete settings beyond the Standard Model of elementary particle physics. The paper ends with an extensive review of current and future astrophysical and laboratory searches, highlighting new ideas and their experimental challenges, as well as future perspectives for the discovery of sterile neutrinos.

show abstract

Section: Electron Capture Experiments (Author: L Gastaldo)mentioning

confidence: 99%

Section: Electron Capture Experiments (Author: L Gastaldo)mentioning

confidence: 99%

A White Paper on keV sterile neutrino Dark Matter

Adhikari

Agostini

et al. 2017

J. Cosmol. Astropart. Phys.

Self Cite

380

316

View full text Add to dashboard Cite

show abstract

“…Though Metallic magnetic calorimeters (MMCs) are low-temperature particle detectors that use a paramagnetic temperature sensor sitting in a weak magnetic field to convert an energy input into a magnetic flux change which can be precisely measured using a superconducting quantum interference device (SQUID). 1,2 MMCs have proven to be highly suitable detectors for various applications including high-resolution X-ray spectroscopy in atomic and nuclear physics, 3,4 nuclear forensics, 5,6 radiation metrology, 7-12 direct neutrino mass determination, 13 searches for neutrinoless double beta decay 14,15 and mass spectrometry 16 since they provide an excellent energy resolution, a very fast intrinsic signal rise time, a high quantum efficiency, a large energy bandwidth as well as a highly linear detector response. State-of-the-art MMC soft X-ray detectors, for example, reach an energy resolution ∆E FWHM = 1.58 eV for 5.9 keV photons and a signal rise time τ rise < 100 ns.…”

mentioning

confidence: 99%

Demonstration of a scalable frequency-domain readout of metallic magnetic calorimeters by means of a microwave SQUID multiplexer

et al. 2017

View full text Add to dashboard Cite

We report on the first demonstration of a scalable GHz frequency-domain readout of metallic magnetic calorimeters (MMCs) using a 64 pixel detector array that is read out by an integrated, on-chip microwave SQUID multiplexer. The detector array is optimized for detecting soft X-ray photons and the multiplexer is designed to provide a signal rise time τrise<400ns and an intrinsic energy sensitivity ϵ<30h. This results in an expected energy resolution ΔEFWHM<10eV. We measured a signal rise time τrise as low as 90ns and an energy resolution ΔEFWHM as low as 50eV for 5.9keV photons. The rise time is about an order of magnitude faster compared to other multiplexed low-temperature microcalorimeters and close to the intrinsic value set by the coupling between electron and spins. The energy resolution is degraded with respect to our design value due to a rather low intrinsic quality factor of the microwave resonators that is caused by the quality of the Josephson junction of the associated rf-SQUID as well as an elevated chip temperature as compared to the heat bath. Though the achieved energy resolution is not yet compatible with state-of-the-art single-channel MMCs, this demonstration of a scalable readout approach for MMCs in combination with the full understanding of the device performance showing ways how to improve represents an important milestone for the development of future large-scale MMC detector arrays.

show abstract

“…Different detector technologies have been used to attain an energy resolution of <100 eV full-width at half-maximum (FWHM) at energies of up to 100 keV, including Si and Ge thermistors [15,16,17], superconducting transition edge sensors (TESs) [18,19], and more recently, metallic magnetic calorimeters (MMCs) [20,21]. This work focuses on MMCs, as their CHAPTER 1.…”

Section: Metallic Magnetic Calorimetersmentioning

confidence: 99%

“…Devices in this dissertation were based on their fabrication process and therefore use the same combination of host and paramagnetic ion. Gold makes a good host material for many paramagnetic ions because these ions can exist in concentrations up to a few thousand ppm without forming separate inclusions [63].…”

Section: Selection Of Host Materialsmentioning

confidence: 99%

Development of Metallic Magnetic Calorimeters for Nuclear Safeguards Applications

Bates

2015

View full text Add to dashboard Cite

Many nuclear safeguards applications could benefit from high-resolution gamma-ray spectroscopy achievable with metallic magnetic calorimeters. This dissertation covers the development of a system for these applications based on gamma-ray detectors developed at the University of Heidelberg. It demonstrates new calorimeters of this type, which achieved an energy resolution of 45.5 eV full-width at half-maximum at 59.54 keV, roughly ten times better than current state of the art high purity germanium detectors. This is the best energy resolution achieved with a gamma-ray metallic magnetic calorimeter at this energy to date. In addition to demonstrating a new benchmark in energy resolution, an experimental system for measuring samples with metallic magnetic calorimeters was constructed at Lawrence Livermore National Laboratory. This system achieved an energy resolution of 91.3 eV full-width at half-maximum at 59.54 keV under optimal conditions. Using this system it was possible to characterize the linearity of the response, the count-rate limitations, and the energy resolution as a function of temperature of the new calorimeter. With this characterization it was determined that it would be feasible to measure 242 Pu in a mixed isotope plutonium sample. A measurement of a mixed isotope plutonium sample was performed over the course of 12 days with a single two-pixel metallic magnetic calorimeter. The relative concentration of 242 Pu in comparison to other plutonium isotopes was determined by direct measurement to less than half a percent accuracy. This is comparable with the accuracy of the best-case scenario using traditional indirect methods. The ability to directly measure the relative concentration of 242 Pu in a sample could enable more accurate accounting and detection of indications of undeclared activities in nuclear safeguards, a better constraint on source material in forensic samples containing plutonium, and improvements in verification in a future plutonium disposition treaty.

show abstract

Metallic magnetic calorimeters

Cited by 94 publications

References 0 publications

A White Paper on keV sterile neutrino Dark Matter

A White Paper on keV sterile neutrino Dark Matter

Demonstration of a scalable frequency-domain readout of metallic magnetic calorimeters by means of a microwave SQUID multiplexer

Development of Metallic Magnetic Calorimeters for Nuclear Safeguards Applications

Contact Info

Product

Resources

About