A cryogenic tracking detector for antihydrogen detection in the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e454" altimg="si123.svg"><mml:mtext>AEgIS</mml:mtext></mml:math> experiment

Amsler, C.; Antonello, M.; Belov, Alexander S.; Bonomi, G.; Brusa, R. S.; Caccia, M.; Camper, Antoine; Caravita, R.; Castelli, F.; Comparat, D.; Consolati, G.; Demetrio, A.; Noto, L. Di; Doser, M.; Ekman, P. A.; Fanì, M.; Ferragut, R.; Gerber, S.; Giammarchi, M.; Gligorova, A.; Guatieri, F.; Hackstock, P.; Haider, David; Haider, S.; Hinterberger, A.; Kellerbauer, A.; Khalidova, O.; Krasnický, D.; Lagomarsino, V.; Malbrunot, C.; Mariazzi, S.; Matveev, V.; Müller, Simon; Nebbia, G.; Nédélec, P.; Nowak, L.; Oberthaler, Markus K.; Pagano, D.; Penasa, L.; Petráček, V.; Prelz, F.; Prevedelli, M.; Rienäcker, B.; Robert, J.; Røhne, O.; Rotondi, A.; Sandaker, H.; Santoro, R.; Storey, J. W.; Testera, G.; Tietje, I. C.; Toso, V.; Wolz, T.; Wuethrich, J.; Yzombard, P.; Zimmer, Christian; Zurlo, N.

doi:10.1016/j.nima.2020.163637

Cited by 5 publications

(1 citation statement)

References 23 publications

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“…Firstly, increasing the dimensions of the image sensor can ease its use as a device for the detection and optimization of positron beams. Secondly, high-precision temporal tagging can be achieved with an integrated front-end that transmits only the locations of individual positrons, rather than the entire image, following designs that are common for larger particle detectors 30 . Thirdly, a decrease in pixel size would increase the precision of position measurements.…”

Section: Discussionmentioning

confidence: 99%

Imaging low-energy positron beams in real-time with unprecedented resolution

Berghold,

Burwitz,

Mathes

et al. 2023

Sci Rep

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Particle beams focused to micrometer-sized spots play a crucial role in forefront research using low-energy positrons. Their expedient and wide application, however, requires highly-resolved, fast beam diagnostics. We have developed two different methods to modify a commercial imaging sensor to make it sensitive to low-energy positrons. The first method consists in removing the micro-lens array and Bayer filter from the sensor surface and depositing a phosphor layer in their place. This procedure results in a detector capable of imaging positron beams with energies down to a few tens of eV, or an intensity as low as $${35}\,{\hbox {e}^+/\hbox {s/mm}^{2}}$$ 35 e + / s/mm 2 when the beam energy exceeds 10 $${\hbox {keV}}$$ keV . The second approach omits the phosphor deposition; with the resulting device we succeeded in detecting single positrons with energies upwards of $${6}\,{\hbox {keV}}$$ 6 keV and efficiency up to 93%. The achieved spatial resolution of 0.97 $$\upmu \hbox {m}$$ μ m is unprecedented for real-time positron detectors.

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Section: Discussionmentioning

confidence: 99%

Imaging low-energy positron beams in real-time with unprecedented resolution

Berghold,

Burwitz,

Mathes

et al. 2023

Sci Rep

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A fiber detector to monitor ortho-Ps formation and decay

Rienäcker

Brusa

Caravita

et al. 2022

Nuclear Instruments and Methods in Physics Research Section A:

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Developments for pulsed antihydrogen production towards direct gravitational measurement on antimatter

Fanì¹,

Antonello²,

Belov³

et al. 2020

Phys. Scr.

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A main scientific goal of the AEgIS experiment is the direct measurement of the Earth's local gravitational acceleration g on antihydrogen. The Weak Equivalence Principle is a foundation of General Relativity. It has been extensively tested with ordinary matter but very little is known about the gravitational interaction between matter and antimatter. Antihydrogen is produced in AEgIS via resonant charge-exchange reaction between cold Rydberg-excited positronium and cooled down antiprotons. The achievements for the development of a pulsed cold antihydrogen source are presented. Large number of antiprotons, necessary for a significant production rate of antihydrogen, are captured, accumulated, compressed and cooled over an extended period of time. Positronium (Ps) is formed through e + -Ps conversion in a silica porous target at 10 K temperature in a reflection geometry inside the main apparatus. The so-formed Ps cloud is then laser-excited to Rydberg levels, for the first time in a 1 T magnetic field. Consequently, a detailed characterization of the Ps source for antihydrogen production in magnetic field needed to be performed. Several detection techniques are extensively used to monitor antiproton and positron manipulations in the formation process of antihydrogen inside the main apparatus. Positronium detection techniques underwent extensive improvements in sensitivity during the last antiproton run. At the same time, major efforts to improve integrate and commission the detectors sensitive to antihydrogen production took place.

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A cryogenic tracking detector for antihydrogen detection in the AEgIS experiment

Cited by 5 publications

References 23 publications

Imaging low-energy positron beams in real-time with unprecedented resolution

Imaging low-energy positron beams in real-time with unprecedented resolution

A fiber detector to monitor ortho-Ps formation and decay

Developments for pulsed antihydrogen production towards direct gravitational measurement on antimatter

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