Slowing down of fast electrons as probe for charging and decharging dynamics of ion-irradiated insulators

Journal Article · Wed Jun 15 04:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.064901· OSTI ID:21550235

De Filippo, E; Lanzano, G ^[1]; Amorini, F ^[2]; Geraci, E; Grassi, L; Politi, G ^[1]; La Guidara, E ^[1]; Lombardo, I ^[2]; Rizzo, F ^[2]; Russotto, P ^[2]; Volant, C ^[3]; Hagmann, S ^[4]; Rothard, H ^[5]

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1. Istituto Nazionale di Fisica Nucleare Sezione di Catania, Via S. Sofia 64, I-95123 Catania (Italy)
2. Istituto Nazionale di Fisica Nucleare-Laboratori Nazionali del Sud, LNS, Via S. Sofia 62, I-95123 Catania (Italy)
3. Departement Astrophysique, Physique des Particules, Physique Nucleaire et de l'Instrumentation Associee/Service de Physique Nucleaire, CEA/Saclay, F-91191 Gif-sur-Yvette (France)
4. GSI Helmholtzzentrum fuer Schwerionenforschung, D-64291 Darmstadt (Germany)
5. Centre de Recherche sur les ions, les Materiaux et la Photonique, CIMAP-CIRIL-Ganil (CEA/CNRS/ENSICAEN/Universite de Caen-Basse Normandie), BP 5133, F-14070 Caen Cedex 05 (France)

The slowing down of fast electrons emitted from insulators [Mylar, polypropylene (PP)] irradiated with swift ion beams (C, O, Kr, Ag, Xe; 20-64 MeV/u) was measured by the time-of-flight method at LNS, Catania and GANIL, Caen. The charge buildup, deduced from both convoy- and binary-encounter electron peak shifts, leads to target material-dependent potentials (6.0 kV for Mylar, 2.8 kV for PP). The number of projectiles needed for charging up (charging-up time constant) is inversely proportional to the electronic energy loss. After a certain time, a sudden decharging occurs. For low beam currents, charging-up time, energy shift corresponding to maximum charge buildup, and time of decharging are regular. For high beam currents, the time intervals become irregular (chaotic).

• OSTI ID: 21550235
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 83; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACCELERATORS
BEAM CURRENTS
BEAMS
BUILDUP
CHARGES
CURRENTS
CYCLIC ACCELERATORS
CYCLOTRONS
ELECTRONS
ELEMENTARY PARTICLES
ENERGY LOSSES
ENERGY RANGE
ESTERS
FERMIONS
GANIL CYCLOTRON
HEAVY ION ACCELERATORS
ION BEAMS
ISOCHRONOUS CYCLOTRONS
LEPTONS
LOSSES
MATERIALS
MEV RANGE
MYLAR
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYESTERS
POLYMERS
POLYOLEFINS
POLYPROPYLENE
POTENTIALS
SLOWING-DOWN
SYNTHETIC MATERIALS
TIME-OF-FLIGHT METHOD