AEgIS experiment commissioning at CERN

Krasnický, D.; Aghion, S.; Amsler, C.; Ariga, A.; Ariga, T.; Белов, А. С.; Bonomi, G.; Bräunig, P.; Brusa, R. S.; Bremer, J.; Burghart, G.; Cabaret, L.; Caccia, M.; Canali, C.; Caravita, R.; Castelli, F.; Cerchiari, G.; Cialdi, S.; Comparat, D.; Consolati, G.; Dassa, Luca; Domizio, S. Di; Noto, L. Di; Doser, M.; Dudarev, A.; Ereditato, A.; Ferragut, R.; Fontana, A.; Genova, P.; Giammarchi, M.; Gligorova, A.; Gninenko, S.; Hogan, Stephen; Haider, S.; Jordan, Elena; Jo, L. V.; rgensen,; Kaltenbacher, T.; Kawada, J.; Kellerbauer, A.; Kimura, Mitsuhiro; Lagomarsino, V.; Mariazzi, S.; Matveev, V.; Merkt, F.; Moia, F.; Nebbia, G.; Nédélec, P.; Oberthaler, Markus K.; Pacifico, N.; Petráček, V.; Pistillo, C.; Prelz, F.; Prevedelli, M.; Regenfus, C.; Riccardi, C.; Ro, O.; hne,; Rotondi, A.; Sandaker, H.; Scampoli, P.; Storey, J. W.; Vásquez, M. A. Subieta; Špaček, M.; Testera, G.; Vaccarone, R.; Villa, F.; Zavatarelli, S.

doi:10.1063/1.4796070

Cited by 19 publications

(7 citation statements)

References 14 publications

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“…Antiprotons from AD are routinely trapped and cooled by collisions with electrons (confined together with antiprotons) in the trapping region: typically 1.2 • 10 5 antiprotons for each AD pulse are caught thanks to the 5 T field and the high voltage (9 kV) applied to the trap electrodes. Results are reported in [11].…”

Section: The Main Trapsmentioning

confidence: 99%

The AEgIS experiment

Testera¹,

Aghion²,

Amsler³

et al. 2015

Hyperfine Interact

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The AEgIS experiment is presently almost completely installed at CERN. It is currently taking data with antiprotons, electrons and positrons. The apparatus is designed to form a cold, pulsed beam of antihydrogen to measure the Earth’s gravitational acceleration g on antimatter and to perform spectroscopy measurements. This paper describes the main features of the apparatus and shows a selected review of some achieved results

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Section: The Main Trapsmentioning

confidence: 99%

The AEgIS experiment

Testera¹,

Aghion²,

Amsler³

et al. 2015

Hyperfine Interact

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“…About 10 5 antiprotons (out of the 3 10 7 delivered by the Antiproton Decelerator at CERN) are routinely caught in flight by fast switching the voltage of trap electrodes to 9 kV in the 5 T region. The antiprotons are then cooled by collisions with a plasma of more than 10 8 electrons pre-loaded in the same trap [8]. Electrons radiate their energy very efficiently in the high magnetic field and within few tens of seconds both of the species remain trapped within a potential well of few tens of Volts and in a few centimeters of length.…”

Section: Jinst 10 P01009mentioning

confidence: 99%

Toward sub-Kelvin resistive cooling and non destructive detection of trapped non-neutral electron plasma

et al. 2015

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A resonant circuit tuned to a particular frequency of the motion of charged particles stored in a Penning trap and connected to a low noise amplifier allows, at the same time, cooling and non destructive detection of the particles. Its use is widely diffused when single or few particles are stored near the centre of a hyperbolic Penning trap. We present a consistent model that predicts the shape of the induced signal when the tuned circuit is used to detect and cool the axial motion of a cold non neutral plasma stored in an open-ended cylindrical Penning trap. The model correctly accounts for the not negligible axial plasma size. We show that the power spectrum of the signal measured across the tuned circuit provides information about the particle number and insights about the plasma temperature. We report on the design of a HEMT-based cryogenic amplifier working at 14.4 MHz and 4.2 K and the results of the noise measurements. We have measured a drain current noise in the range from 6 to 17 pA/ √ Hz, which corresponds to an increase of the tuned circuit equivalent temperature of at maximum 0.35 K. The cryogenic amplifier has a very low power consumption from few tens to few hundreds of µW corresponding to a drain current in the range 100-800 µA. An additional contribution due to the gate noise has been identified when the drain current is below 300 µA; above that value an upper limit of the increase of the equivalent tuned circuit temperature due to this contribution of 0.02 K has been obtained. These features make the tuned circuit connected to this amplifier a promising device for detecting and cooling the axial motion of an electron plasma when the Penning trap is mounted inside a dilution refrigerator.

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“…1. A nanoporous silicon positron-Ps converter developed for cryogenic use [13] is located 1.5 cm above the cylindrical Malmberg-Penning trap forp plasmas storage for the pulsedH experiment [14,15]. An aperture in the upper part of the trap electrodes is realized to allow Rydberg Ps atoms produced outside to reach thep plasma.…”

Section: Methodsmentioning

confidence: 99%

Hybrid Imaging and Timing Ps Laser Excitation Diagnostics for Pulsed Antihydrogen Production

et al. 2020

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In this work we present a hybrid detection method providing simultaneous imaging and timing information suitable for fully monitoring positronium (Ps) formation, its laser excitation, and its spatial propagation for the first trials of pulsed antihydrogen (H) production through a charge-exchange reaction with trapped antiprotons (p). This combined method, based on the synchronous acquisition of an EJ-200 scintillation detector and a microchannel plate (MCP) detector with a dual readout (phosphor screen image and electrical pick-up signal), allows all relevant events in the experiment to be accurately determined in time while allowing high resolution images of e + from Ps laser photodissociations to be acquired. The timing calibration process of the two detectors discussed in details as well as the future perspectives opened by this method.

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AEgIS experiment commissioning at CERN

Cited by 19 publications

References 14 publications

The AEgIS experiment

The AEgIS experiment

Toward sub-Kelvin resistive cooling and non destructive detection of trapped non-neutral electron plasma

Hybrid Imaging and Timing Ps Laser Excitation Diagnostics for Pulsed Antihydrogen Production

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