Journal
REVIEW OF SCIENTIFIC INSTRUMENTS
Volume 87, Issue 2, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.4934688
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Funding
- STFC [ST/G008248/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/G008248/1] Funding Source: researchfish
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Several fluorescent materials were tested for use in the imaging screen of a pepper-pot emittance meter that is suitable for investigating the beam dynamics of multiply charged heavy ions extracted from an ECR ion source. SiO2 (quartz), KBr, Eu-doped CaF2, and Tl-doped CsI crystals were first irradiated with 6.52-keV protons to determine the effects of radiation damage on their fluorescence emission properties. For such a low-energy proton beam, only the quartz was found to be a suitable fluorescent material, since the other materials suffered a decay in fluorescence intensity with irradiation time. Subsequently, quartz was irradiated with heavy C-12(4+), O-16(4+), and Ar-40(11+) ions, but it was found that the fluorescence intensity decreased too rapidly to measure the emittance of these heavy-ion beams. These results suggest that a different energy loss mechanism occurs for heavier ions and for protons. (C) 2015 AIP Publishing LLC.
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