Response of CR-39 track detector to low-energy heavy ion beams

The Super Separator Spectrometer (S3) will receive the very high intensity heavy ion beams from the LINAG accelerator of SPIRAL2. Its privileged fields of physics are the delayed study of rare nuclei and secondary reactions with exotic nuclei. The project is presently in a phase of conceptual design. It includes a rotating target to sustain the high energy deposit, a two stages separator (momentum achromat) and spectrometer (mass spectrometer). Various detection set-ups are foreseen, especially a delayed α, γ, and electron spectroscopy array and a gas catcher coupled to a low energy branch. We present here the current status of the project and its main features.

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An innovative concept for acceleration of low-energy low-charge-state heavy-ion beams

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment ◽

10.1016/j.nima.2005.03.138 ◽

2005 ◽

Vol 547 (2-3) ◽

pp. 259-269 ◽

Cited By ~ 4

Author(s):

P.N. Ostroumov ◽

A.A. Kolomiets ◽

S. Sharma ◽

N.E. Vinogradov ◽

G.P. Zinkann

Keyword(s):

Charge State ◽

Heavy Ion ◽

Ion Beams ◽

Low Energy ◽

Low Charge ◽

Innovative Concept

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Efficient focusing, bunching, and acceleration of high current heavy ion beams at low energy

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment ◽

10.1016/j.nima.2017.09.059 ◽

2018 ◽

Vol 879 ◽

pp. 19-24 ◽

Cited By ~ 3

Author(s):

Chuan Zhang ◽

Holger Podlech

Keyword(s):

Heavy Ion ◽

Ion Beams ◽

Low Energy ◽

High Current

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Outflow of low-energy O<sup>+</sup> ion beams observed during periods without substorms

Annales Geophysicae ◽

10.5194/angeo-33-333-2015 ◽

2015 ◽

Vol 33 (3) ◽

pp. 333-344 ◽

Cited By ~ 6

Author(s):

G. K. Parks ◽

E. Lee ◽

S. Y. Fu ◽

M. Fillingim ◽

I. Dandouras ◽

...

Keyword(s):

Flow Rate ◽

Heavy Ion ◽

Auroral Oval ◽

Ion Beams ◽

Low Energy ◽

Ion Composition ◽

Spacecraft Potential ◽

Imaging Camera ◽

Cluster Ion ◽

Low Energy Ions

Abstract. Numerous observations have shown that ions flow out of the ionosphere during substorms with more fluxes leaving as the substorm intensity increases (Wilson et al., 2004). In this article we show observations of low-energy (few tens of electron volts) ionospheric ions flowing out periods without substorms, determined using the Wideband Imaging Camera (WIC) and Auroral Electrojet (AE) indices. We use Cluster ion composition data and show the outflowing ions are field-aligned H+, He+ and O+ beams accelerated to energies of ~40–80 eV, after correcting for spacecraft potential. The estimated fluxes of the low-energy O+ ions measured at ~20 000 km altitude are >103–105 cm−2 s. Assuming the auroral oval is the source of the escaping ions, the measured fluxes correspond to a flow rate of ~1019–1021 ions s−1 leaving the ionosphere. However, periods without substorms can persist for hours suggesting the low-energy ions flowing out during these times could be a major source of the heavy ion population in the plasma sheet and lobe.

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