The prototype GAPS (pGAPS) experiment

Mognet, S. A. Isaac; Aramaki, T.; Bando, Nobutaka; Boggs, Steven E.; Doetinchem, P. von; Fuke, H.; Gahbauer, F.; Hailey, Charles J.; Koglin, Jason E.; Madden, N.; Mori, Kaya; Okazaki, Shun; Perez, K.; Tajiri, Gordon; Yoshida, Tetsuya; Zweerink, J.

doi:10.1016/j.nima.2013.08.030

Cited by 28 publications

(29 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Big-bang nucleosynthesis is the dominant natural source of deuterons [27] and, in the absence of baryogenesis, one could assume that the same holds for antideuterons. These antinuclei and even heavier antinuclei can also be produced in pp and pA collisions in interstellar space, representing a background source in the searches for segregated primordial antimatter and dark matter [28][29][30]. As it turns out, the low momentum characteristic yields of antinuclei at central rapidities (compared to forward) lie in an energy region which is best suited for identification by most satellite-borne (low magnetic-field) instruments, such as AMS-02 [28].…”

Section: Introductionmentioning

confidence: 99%

Production of deuterons, tritons, He3 nuclei, and their antinuclei in pp collisions at s=

Acharya¹,

Adam²,

Adamová³

et al. 2018

Phys. Rev. C

109

128

View full text Add to dashboard Cite

Invariant differential yields of deuterons and antideuterons in pp collisions at √ s = 0.9, 2.76 and 7 TeV and the yields of tritons, 3 He nuclei, and their antinuclei at √ s = 7 TeV have been measured with the ALICE detector at the CERN Large Hadron Collider. The measurements cover a wide transverse momentum (p T ) range in the rapidity interval |y| < 0.5, extending both the energy and the p T reach of previous measurements up to 3 GeV/c for A = 2 and 6 GeV/c for A = 3. The coalescence parameters of (anti)deuterons and 3 He nuclei exhibit an increasing trend with p T and are found to be compatible with measurements in pA collisions at low p T and lower energies. The integrated yields decrease by a factor of about 1000 for each increase of the mass number with one (anti)nucleon. Furthermore, the deuteron-to-proton ratio is reported as a function of the average charged particle multiplicity at different center-of-mass energies.

show abstract

Section: Introductionmentioning

confidence: 99%

Production of deuterons, tritons, He3 nuclei, and their antinuclei in pp collisions at s=

Acharya¹,

Adam²,

Adamová³

et al. 2018

Phys. Rev. C

109

128

View full text Add to dashboard Cite

show abstract

“…Using the knowledge gained from the successful prototype GAPS flight [10] [11] and the Si(Li) detector development, work is now progressing towards optimizing the detector fabrication scheme for full flight detector production. The main milestones of this effort are: to verify Li drifting uniformity and build drifting stations capable of drifting 5-10 cm diameter wafers with minimal temperature variations; to either achieve similar high-yield, high-performance production of 10-cmdiameter Si(Li) detectors as demonstrated in 5-cm-diameter detectors, or to fallback to an existing design that utilizes 5cm-diameter detectors to yield the same sensitivity; to implement a scaled-up facility for batch processing of all flight detectors; and to develop ASICs, based on existing prototypes, as well as a final custom pre-amplifier for the Si(Li) detectors.…”

Section: Discussionmentioning

confidence: 99%

Progres on large-scale, low-cost Si(Li) detector fabrication for the GAPS balloon mission

Perez

Aramaki

Brickman

et al. 2013

2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC)

View full text Add to dashboard Cite

The General Antiparticle Spectrometer (GAPS) experiment is an indirect dark matter search that aims to detect low-energy antideuterons resulting from dark matter annihilations and decays in the Galactic halo. Layers of semiconducting lithium-drifted silicon (Si(Li)) tracking detectors are essential to the success of the GAPS detection and background rejection scheme, requiring ∼22.5 square meters of Si(Li) active area with a channel energy resolution of ∼3 keV. To produce this large volume of detectors, we are pursuing a process that can provide the required performance and high yield at approximately two orders of magnitude less cost per unit area than commercially acquired detectors.

show abstract

“…6). 12,13) The pGAPS OHP was developed on the basis of the scaled down U-shaped model described in the previous Section 2.2; it consists of 10 turns of U-shaped tubes each with a check valve, dummy heat load strips on the heating section, a white painted radiator attached to the cooling section, and an albedo shield attached to the adiabatic section. The reservoir was disconnected before the flight.…”

Section: Flight Demonstration With a Scaled-down Ohp Modelmentioning

confidence: 99%

Development of a Cooling System for GAPS using Oscillating Heat Pipe

Fuke

Abe

Daimaru

et al. 2016

AEROSPACE TECHNOLOGY JAPAN

View full text Add to dashboard Cite

A cooling system using oscillating heat pipe (OHP) has been developed for a balloon-borne astrophysics project GAPS (General Anti-Particle Spectrometer). Taking advantages of OHP, such as high conductivity, low-power, and suitability for spread heat source, OHP is planned to be used to cool the GAPS core detectors. OHP is a novel technique and it has never been utilized in practical use neither for a spacecraft nor for a balloon-craft, regardless of its many advantages. In these several years, we have investigated OHP's suitability for GAPS step by step. At first, we have succeeded in developing a scaleddown OHP model with a three-dimensional routing, which can operate in a wide temperature range around between 230 K and 300 K. We also succeeded in the first OHP flight demonstration with a prototype GAPS balloon experiment. Subsequently, we developed actual-sized OHP models with various routings. Numerical simulation models have been developed in parallel to further optimize the OHP design by understanding the OHP performance both macroscopically and microscopically. The design of the OHP check valve has been improved as well. This paper discusses the latest status of the GAPS-OHP development.

show abstract

The prototype GAPS (pGAPS) experiment

Cited by 28 publications

References 18 publications

Production of deuterons, tritons, He3 nuclei, and their antinuclei in pp collisions at s=

Production of deuterons, tritons, He3 nuclei, and their antinuclei in pp collisions at s=

Progres on large-scale, low-cost Si(Li) detector fabrication for the GAPS balloon mission

Development of a Cooling System for GAPS using Oscillating Heat Pipe

Contact Info

Product

Resources

About