Modeling a Three-Stage SQUID System in Space with the First Micro-X Sounding Rocket Flight

Adams, J. S.; Bandler, S. R.; Bastidon, N.; Eckart, Megan E.; Figueroa‐Feliciano, E.; Fuhrman, J.; Goldfinger, D. C.; Hubbard, Allyn E.; Jardin, D.; Kelley, R. L.; Kilbourne, Caroline A.; Manzagol-Harwood, R. E.; McCammon, D.; Okajima, Takashi; Porter, F. S.; Reintsema, C. D.; Smith, S. J.

doi:10.1007/s10909-022-02837-2

Cited by 2 publications

(7 citation statements)

References 8 publications

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“…5). 50 A change in the magnetic flux through the SQ2 summing coil changes the relative phase of the V-Φ response between the three SQUID stages 50 , 60 . For small flux changes, this effect is observed as a change in the baseline of the feedback signal while the SQUIDs are locked in their flux-locked loops.…”

Section: First Flight Resultsmentioning

confidence: 99%

“…The SQUID MUX chips are located on the detector plane, with their loop area vectors oriented in the rocket z axis. Modeling of the flown NIST MUX06a SQUIDs predicts that the locked feedback baseline should respond to a z axis field inside the superconducting shield with a shift of 1.4×10−2 normalΦ0 for a change of 1 mG through the SQ2 summing loop 60 . The flight data is used to calculate the ratio of the external x-axis magnetic field to the implied z-axis field inside the superconducting shield threading the SQ2 summing loop.…”

Section: First Flight Resultsmentioning

confidence: 99%

“…24. 60 Pixels on side X were largely unlocked during the science observation, but the few that had data were observed to be positively correlated with the x-axis magnetometer, which we discuss further in the next section. Reliable SFs cannot be deduced from this data, however, because the locked baseline response is the sum of SQUID and TES effects, and the rocket orientation is changing in roll, pitch, and yaw simultaneously.…”

Section: Tes and Squid Flight Performancementioning

confidence: 99%

“…50 A change in the magnetic flux through the SQ2 summing coil changes the relative phase of the V-Φ response between the three SQUID stages. 50,60 For small flux changes, this effect is observed as a change in the baseline of the feedback signal while the SQUIDs are locked in their flux-locked loops. However, larger flux changes can move the phase offsets between the SQUID stages far enough from their tuned lock point that no stable lock point exists for the system.…”

Section: Tes and Squid Flight Performancementioning

confidence: 99%

“…Modeling of the flown NIST MUX06a SQUIDs predicts that the locked feedback baseline should respond to a z axis field inside the superconducting shield with a shift of 1.4 × 10 −2 Φ 0 for a change of 1 mG through the SQ2 summing loop. 60 The flight data is used to calculate the ratio of the external x-axis magnetic field to the implied z-axis field inside the superconducting shield threading the SQ2 summing loop. The SF is found to be approximately SF x ẑ j SQ2 ¼ 120, which is much smaller than expected, as described in Sec.…”

Section: Tes and Squid Flight Performancementioning

confidence: 99%

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First flight performance of the Micro-X microcalorimeter X-ray sounding rocket

The Micro-X Collaboration:,

Adams,

Baker

et al. 2023

J. Astron. Telesc. Instrum. Syst.

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The flight of the Micro-X sounding rocket on July 22, 2018, marked the first operation of transition-edge sensors and their superconducting quantum interference device readouts in space. The instrument combines the microcalorimeter array with an imaging mirror to take high-resolution spectra from extended X-ray sources. The first flight target was the Cassiopeia A supernova remnant. Although a rocket pointing malfunction led to no time on-target, data from the flight were used to evaluate the performance of the instrument and demonstrate the flight viability of the payload. The instrument successfully achieved a stable cryogenic environment, executed all flight operations, and observed X-rays from the on-board calibration source. The flight environment did not significantly affect the performance of the detectors compared with ground operation. The flight provided an invaluable test of the impact of external magnetic fields and the instrument configuration on detector performance. This flight provides a milestone in the flight readiness of these detector and readout technologies, both of which have been selected for future X-ray observatories.

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Section: First Flight Resultsmentioning

confidence: 99%

Section: First Flight Resultsmentioning

confidence: 99%

Section: Tes and Squid Flight Performancementioning

confidence: 99%

Section: Tes and Squid Flight Performancementioning

confidence: 99%

Section: Tes and Squid Flight Performancementioning

confidence: 99%

See 3 more Smart Citations

First flight performance of the Micro-X microcalorimeter X-ray sounding rocket

The Micro-X Collaboration:,

Adams,

Baker

et al. 2023

J. Astron. Telesc. Instrum. Syst.

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Line Emission Mapper: an X-ray probe mission concept to study the cosmic ecosystems and the physics of galaxy formation

Patnaude,

Kraft,

Kilbourne

et al. 2023

J. Astron. Telesc. Instrum. Syst.

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In the 2020 Astrophysics Decadal Survey, the National Academies identified cosmic feedback and structure formation as a key question that should drive research in the upcoming decade. In response to this recommendation, NASA released a call for X-ray and IR probe-class missions, with a $1B cost cap. The line emission mapper (LEM) is a mission concept designed in response to this call. LEM is a single-instrument X-ray telescope that consists of a Wolter-Schwarzschild type I X-ray optic with a 4 m focal length, coupled with an X-ray microcalorimeter with a 30′ field of view (FoV), 15″ angular resolution, and 2.5 eV energy resolution [full-width half maximum (FWHM)], with a 1.3 eV FWHM energy resolution central subarray. The high throughput X-ray mirror combined with the large FoV and excellent energy resolution allows for efficient mapping of extended emission-line dominated astrophysical objects from megaparsecs to sub-pc scales to study cosmic ecosystems and unveil the physical drivers of galaxy formation.

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Modeling a Three-Stage SQUID System in Space with the First Micro-X Sounding Rocket Flight

Cited by 2 publications

References 8 publications

First flight performance of the Micro-X microcalorimeter X-ray sounding rocket

First flight performance of the Micro-X microcalorimeter X-ray sounding rocket

Line Emission Mapper: an X-ray probe mission concept to study the cosmic ecosystems and the physics of galaxy formation

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