Mechanical design of a 3-stage ADR for the Astro-H mission

James, Bryan L.; Martinez, Raul M.; Shirron, Peter; Tuttle, James; Francis, John J.; Sebastian, Marcelino San; Wegel, Donald; Galassi, Nicholas; McGuinness, Daniel S.; Puckett, David; Flom, Yury

doi:10.1016/j.cryogenics.2012.01.001

Cited by 7 publications

(2 citation statements)

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“…Other loads, such as from sensor wiring, are negligible. As is typical for an ADR designed to survive launch [14], the Kevlar suspensions represent the majority of the heat load. Figure 5 shows the expected heat loads to 50 mK as a function of helium tank temperature.…”

Section: Heat Loads Hold Time and Duty Cycle In Cryogen Modementioning

confidence: 99%

“…A 3D CAD model is shown in Figure 2. Details have been reported on previously for the design and optimization of the ADR [1,10,11,12], its salt pills [11], heat switches [13], magnets and shields [14], mechanical suspensions [14], and the cryogenic system [4] that supports its operation. Basic design and operating parameters are provided in Table 2 for reference.…”

Section: Introductionmentioning

confidence: 99%

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Operating modes and cooling capabilities of the 3-stage ADR developed for the Soft-X-ray Spectrometer instrument on Astro-H

et al. 2016

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A 3-stage adiabatic demagnetization refrigerator (ADR) [1] is used on the Soft X-ray Spectrometer instrument[2] on Astro-H[3] to cool a 6×6 array of x-ray microcalorimeters to 50 mK. The ADR is supported by a cryogenic system[4] consisting of a superfluid helium tank, a 4.5 K Joule-Thomson (JT) cryocooler, and additional 2-stage Stirling cryocoolers that pre-cool the JT cooler and cool radiation shields within the cryostat. The ADR is configured so that it can use either the liquid helium or the JT cryocooler as its heat sink, giving the instrument an unusual degree of tolerance for component failures or degradation in the cryogenic system. The flight detector assembly, ADR and dewar were integrated into the flight dewar in early 2014, and have since been extensively characterized and calibrated. This paper summarizes the operation and performance of the ADR in all of its operating modes.

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Section: Heat Loads Hold Time and Duty Cycle In Cryogen Modementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Operating modes and cooling capabilities of the 3-stage ADR developed for the Soft-X-ray Spectrometer instrument on Astro-H

et al. 2016

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Integration of Adiabatic Demagnetization Refrigerators with Spaceflight Cryocoolers

Shirron

DiPirro

2020

Cryocoolers

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Thermodynamic performance of the 3-stage ADR for the Astro-H Soft-X-ray Spectrometer instrument

et al. 2016

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The Soft X-ray Spectrometer (SXS) instrument [1] on Astro-H[2] will use a 3-stage ADR [3] to cool the microcalorimeter array to 50 mK. In the primary operating mode, two stages of the ADR cool the detectors using superfluid helium at ≤1.20 K as the heat sink [4]. In the secondary mode, which is activated when the liquid helium is depleted, the ADR uses a 4.5 K Joule-Thomson cooler as its heat sink. In this mode, all three stages operate together to continuously cool the (empty) helium tank and singleshot cool the detectors. The flight instrument -dewar, ADR, detectors and electronics -were integrated in 2014 and have since undergone extensive performance testing. This paper presents a thermodynamic analysis of the ADR's operation, including cooling capacity, heat rejection to the heat sinks, and various measures of efficiency.

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Mechanical design of a 3-stage ADR for the Astro-H mission

Cited by 7 publications

References 1 publication

Operating modes and cooling capabilities of the 3-stage ADR developed for the Soft-X-ray Spectrometer instrument on Astro-H

Operating modes and cooling capabilities of the 3-stage ADR developed for the Soft-X-ray Spectrometer instrument on Astro-H

Integration of Adiabatic Demagnetization Refrigerators with Spaceflight Cryocoolers

Thermodynamic performance of the 3-stage ADR for the Astro-H Soft-X-ray Spectrometer instrument

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