skip to main content

SciTech ConnectSciTech Connect

Title: An inductively heated hot cavity catcher laser ion source

An inductively heated hot cavity catcher has been constructed for the production of low-energy ion beams of exotic, neutron-deficient Ag isotopes. A proof-of-principle experiment has been realized by implanting primary {sup 107}Ag{sup 21+} ions from a heavy-ion cyclotron into a graphite catcher. A variable-thickness nickel foil was used to degrade the energy of the primary beam in order to mimic the implantation depth expected from the heavy-ion fusion-evaporation recoils of N = Z {sup 94}Ag. Following implantation, the silver atoms diffused out of the graphite and effused into the catcher cavity and transfer tube, where they were resonantly laser ionized using a three-step excitation and ionization scheme. Following mass separation, the ions were identified by scanning the frequency of the first resonant excitation step while recording the ion count rate. Ion release time profiles were measured for different implantation depths and cavity temperatures with the mean delay time varying from 10 to 600 ms. In addition, the diffusion coefficients for silver in graphite were measured for temperatures of 1470 K, 1630 K, and 1720 K, from which an activation energy of 3.2 ± 0.3 eV could be determined.
Authors:
 [1] ; ; ; ;  [2] ;  [3] ;  [4]
  1. Nuclear Physics Group, School of Physics and Astronomy, Schuster Laboratory, The University of Manchester, Brunswick Street, Manchester M13 9PL (United Kingdom)
  2. Department of Physics, University of Jyväskylä, Survontie 9, FI-40014 Jyväskylä (Finland)
  3. CERN, CH-1211, Geneva 23 (Switzerland)
  4. Department of Quantum Engineering, Nagoya University, Nagoya, Aichi 464-8603 (Japan)
Publication Date:
OSTI Identifier:
22482640
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 86; Journal Issue: 12; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ACTIVATION ENERGY; BEAMS; COUNTING RATES; CYCLOTRONS; DEPTH; EV RANGE 01-10; EVAPORATION; EXCITATION; FOILS; GRAPHITE; HEAVY IONS; ION SOURCES; LASERS; NICKEL; SILVER; SILVER 107; SILVER 94; THICKNESS