A simulation of X-ray shielding for a superconducting electron cyclotron resonance ion source

It is generally assumed that large amounts of x-rays are emitted from the ion source of an Electron Cyclotron Resonance (ECR) instrument. The total amount of x-rays should be strictly limited to avoid the extra heat load to the cryostat of the superconducting ECR ion source, since they are partly ab...

Full description

Saved in:
Bibliographic Details
Published in:Review of scientific instruments 2014-02, Vol.85 (2), p.02A948-02A948
Main Authors: Park, Jin Yong, Won, Mi-Sook, Lee, Byoung-Seob, Yoon, Jang-Hee, Choi, Seyong, Ok, Jung-Woo, Choi, Jeong-Sik, Kim, Byoung-Chul
Format: Article
Language:English
Subjects:
CRYOSTATS
ECR ION SOURCES
ELECTRON CYCLOTRON-RESONANCE
GHZ RANGE 01-100
HEATING LOAD
PARTICLE ACCELERATORS
SHIELDING
SHIELDS
SIMULATION
THICKNESS
X RADIATION
X-RAY SPECTRA
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:It is generally assumed that large amounts of x-rays are emitted from the ion source of an Electron Cyclotron Resonance (ECR) instrument. The total amount of x-rays should be strictly limited to avoid the extra heat load to the cryostat of the superconducting ECR ion source, since they are partly absorbed by the cold mass into the cryostat. A simulation of x-ray shielding was carried out to determine the effective thickness of the x-ray shield needed via the use of Geant4. X-ray spectra of the 10 GHz Nanogan ECR ion source were measured as a function of the thickness variation in the x-ray shield. The experimental results were compared with Geant4 results to verify the effectiveness of the x-ray shield. Based on the validity in the case of the 10 GHz ECR ion source, the x-ray shielding results are presented by assuming the spectral temperature of the 28 GHz ECR ion source.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4854955