Stopping of Slow Ions

Ciurea

2013

Astroparticle Physics

The cryogenic detectors in the form of bolometers are presently used for different applications, in particular for very rare or hypothetical events associated with new forms of matter, specifically related to searches for Dark Matter. In the detection of particles with a semiconductor as target and detector, usually two signals are measured: ionization and heat. The amplification of the thermal signal is obtained with the prescriptions from the Luke-Neganov effect. The energy deposited in the semiconductor lattice as stable defects in the form of Frenkel pairs at cryogenic temperatures, following the interaction of a dark matter particle, is evaluated and consequences for measured quantities are discussed. This contribution is included in the energy balance of the Luke effect. Applying the present model to germanium and silicon, we found that for the same incident weakly interacting massive particle the energy deposited in defects in germanium is about twice the value for silicon. Keywords: dark matter; detectors; low temperature; semiconductors; defects; WIMP. PACS

Section: Resultsmentioning

confidence: 99%

Analysis of defect formation in semiconductor cryogenic bolometric detectors created by heavy dark matter

Ciurea

2013

Astroparticle Physics

Plasma Phys. Control. Fusion

“…Following this idea, the spread of Y x in figure 4 could be associated with the pinch irregularities. Another possibility of this spread in the values of Y x is the existence of multiple mechanisms [54] that reduce the electron energy when penetrating the tungsten pellet placed in the anode end.…”

Section: Discussionmentioning

confidence: 99%

Dense plasma focus: different cathode geometries and their influence on the hard x-ray production

Barbaglia

Giovachini

Milanese

2023

Using the plasma-focus device called PACO (Plasma Auto COnfinado), three types of cathodes were experimentally investigated to evaluate their influence on the hard X-ray production. Two barred cathodes with diameters of 82 mm and 90 mm and one cathode without any specific structure (i.e. the current sheet flowed freely on the radial axis) were tested for this work. In every experiment, the capacitor bank was charged to 31KV. The gas used was deuterium in the pressure range of 0.5 mbar and 3.0 mbar. The production of neutrons and hard X-ray simultaneously was not detected outside this range. Using the cathode with a diameter of 82 mm the hard X-ray production was maximized.

“…[50][51][52] In the case of electronic stopping, the energy loss is governed by electron capture, excitation and ionization of the electrons in the irradiated ions and impacted target, leading to more complex energy transfer, which cannot be described by the scattering process. In the high energy regime, the electronic stopping is usually treated using the Bethe-Bloch formula, 53 as follows:…”

Section: Energy Transfer Model From Energetic Ions To 2d Layered Stru...mentioning

confidence: 99%

Recent progresses on ion beam irradiation induced structure and performance modulation of two-dimensional materials

Luo

Cheng

et al. 2023

Nanoscale