Measurements of source divergence angle of pulsed nitrogen ion beams

Citation
K. Kasuya et al., Measurements of source divergence angle of pulsed nitrogen ion beams, NUCL INST A, 464(1-3), 2001, pp. 587-591
Citations number
4
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
0168-9002 → ACNP
Volume
464
Issue
1-3
Year of publication
2001
Pages
587 - 591
Database
ISI
SICI code
0168-9002(20010521)464:1-3<587:MOSDAO>2.0.ZU;2-X
Abstract
Singly or doubly ionized nitrogen beams, including a small part of oxygen i on beams, were extracted from a cryogenic diode with N2O ice on the anode s urface. The nominal diode voltage was 100-360 kV, and the peak ion current was 300 A. With a one-dimensional arrayed pinhole camera with 5 pinholes, v ery small divergence angle at the beam source was measured. Although, we us ed a very rough apparatus (not being as sophisticated as the modern version ), the absolute value (measured) of the divergence angle was 5-6 mrad. This value was small enough for us to recommend this beam as one of the candida tes for the future ICF or IFE driver. With the same apparatus, we observed a rather large angle of 25-60 mrad for the proton beam in our former experi ment. These results indicated that this kind of medium-mass ion beam must b e investigated in more detail to make clear the potential of the beam. We a lso developed a Thomson ion spectometer with a CCD detector, which could be applicable to the above ion beams. The energy spectrum of a proton beam wa s measured as the early stage preparation of the spectrometer development. (C) 2001 Elsevier Science B.V. All rights reserved.