Highly Sensitive and Easy-to-Use SQUID Sensors

Drung, D.; Assmann, C.; Beyer, J.; Kirste, A.; Peters, M.; Ruede, F.; Schurig, T.

doi:10.1109/tasc.2007.897403

Cited by 313 publications

(230 citation statements)

References 19 publications

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“…The detector response has been characterized, as well as the performance, in terms of energy resolution and time profile of the signals. A double stage SQUID circuit [63] has been used for the read out of the detector. More details about the readout of MMCs will be given in Section 6.…”

Section: Mmcs With Embedded 163 Homentioning

confidence: 99%

“…The implementation of a two-stage SQUID setup requires a first-stage SQUID, an amplifier SQUID, a room-temperature feedback electronics as well as about ten electrical wires that are routed from room-temperature to the SQUID setup. The power load to the cryogenic platform is of the order of some nW [63] and is therefore acceptable for modern dilution refrigerators. However, the readout of large MMC detector arrays as required for the ECHo experiment is hardly possible by simply multiplying the single-channel detector readout since the number of SQUIDs, feedback electronics and electrical wires scales linearly with the number of detectors.…”

Section: Single-channel Readout Of Metallic Magnetic Calorimetersmentioning

confidence: 99%

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The electron capture in 163Ho experiment – ECHo

Gastaldo

Blaum

Chrysalidis

et al. 2017

Eur. Phys. J. Spec. Top.

136

110

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Abstract. Neutrinos, and in particular their tiny but non-vanishing masses, can be considered one of the doors towards physics beyond the Standard Model. Precision measurements of the kinematics of weak interactions, in particular of the 3 H β-decay and the 163 Ho electron capture (EC), represent the only model independent approach to determine the absolute scale of neutrino masses. The electron capture in 163 Ho experiment, ECHo, is designed to reach sub-eV sensitivity on the electron neutrino mass by means of the analysis of the calorimetrically measured electron capture spectrum of the nuclide 163 Ho. The maximum energy available for this decay, about 2.8 keV, constrains the type of detectors that can be used. Arrays of low temperature metallic magnetic calorimeters (MMCs) are being developed to measure the 163 Ho EC spectrum with energy resolution below 3 eV FWHM and with a time resolution below 1 μs. To achieve the sub-eV sensitivity on the electron neutrino mass, together with the detector optimization, the availability of large ultra-pure 163 Ho samples, the identification and suppression of background sources as well as the precise parametrization of the 163 Ho EC spectrum are of utmost importance. The high-energy resolution 163 Ho spectra measured with the first MMC prototypes with ion-implanted 163 Ho set the basis for the ECHo experiment. We describe the conceptual design of ECHo and motivate the strategies we have adopted to carry on the present medium scale experiment, ECHo-1K. In this experiment, the use of 1 kBq 163 Ho will allow to reach a neutrino mass sensitivity below 10 eV/c 2 . We then discuss how the results being achieved in ECHo-1k will guide the design of the next stage of the ECHo experiment, ECHo-1M, where a source of the order of 1 MBq 163 Ho embedded in large MMCs arrays will allow to reach sub-eV sensitivity on the electron neutrino mass.

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Section: Mmcs With Embedded 163 Homentioning

confidence: 99%

Section: Single-channel Readout Of Metallic Magnetic Calorimetersmentioning

confidence: 99%

The electron capture in 163Ho experiment – ECHo

Gastaldo

Blaum

Chrysalidis

et al. 2017

Eur. Phys. J. Spec. Top.

136

110

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“…TESs have been characterized in a dedicated holder of a dilution refrigerator coupled to a SQUID, generation C6, type X216, with a nominal current noise of 3 pA/Hz 0.5 provided by PTB [19]. The bias circuit uses a parallel shunt resistance, R sh = 2 m, small compared with the R n of the TES, which results in an effective voltage bias for most of the transition and thus a stabilizing negative electrothermal feedback [1].…”

Section: Characterization Set-upmentioning

confidence: 99%

Development of Cryogenic X-Ray Detectors Based on Mo/Au Transition Edge Sensors

Pobes

Fàbrega

Camón

et al. 2017

IEEE Trans. Appl. Supercond.

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Abstract-We report on the development of Mo/Au based Transition Edge Sensors (TESs) aimed at soft X-ray detection. TESs of different sizes with T c~1 00 mK and very narrow transitions have been fabricated. Dark characterization based on I-V, complex impedance and noise measurements has allowed us to obtain their basic functional parameters at different bath temperatures and operating points. Electrodeposited Bi films, to be used as X-ray absorbers, have been developed and characterized.  Index Terms-Transition Edge Sensors, X-ray spectroscopy, proximity effect, radiation detectors

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“…Joule heating stabilizes the TES on its transition, and the operating resistance is about 2.3 . The current through the TES is read out with a SQUID amplifier and roomtemperature electronics from Magnicon [11], which are coupled to a fast (6 GHz) digitizing oscilloscope. Energy deposited in the voltage-biased TES results in a negative current pulse with an integrated charge that is proportional to the energy absorbed.…”

Section: The Transition Edge Sensormentioning

confidence: 99%

Calorimetric Observation of Single $$\hbox {He}_2^*$$ Excimers in a 100-mK He Bath

et al. 2016

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We report the first calorimetric detection of individual He * 2 excimers within a bath of superfluid 4 He. The detector used in this work is a single superconducting titanium transition edge sensor (TES) with an energy resolution of ∼1 eV, immersed directly in the helium bath. He * 2 excimers are produced in the surrounding bath using an external gamma-ray source. These excimers exist either as short-lived singlet or long-lived triplet states. We demonstrate detection (and discrimination) of both states: In the singlet case the calorimeter records the absorption of a prompt ≈15 eV photon, and in the triplet case the calorimeter records a direct interaction of the molecule with the TES surface, which deposits a distinct fraction of the ≈15 eV, released upon decay, into the surface. We also briefly discuss the detector fabrication and characterization.

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Highly Sensitive and Easy-to-Use SQUID Sensors

Cited by 313 publications

References 19 publications

The electron capture in 163Ho experiment – ECHo

The electron capture in 163Ho experiment – ECHo

Development of Cryogenic X-Ray Detectors Based on Mo/Au Transition Edge Sensors

Calorimetric Observation of Single $$\hbox {He}_2^*$$ Excimers in a 100-mK He Bath

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