Improved flash x-ray uniformity at 19 MeV using a compound-lens diode

Significantly improved spatial uniformity of bremsstrahlung radiation, relative to a planar-anode diode, is obtained on the HERMES III accelerator when a compound-lens diode is used to control the 19-MeV, 700-kA electron beam. The compound-lens diode uses a conical anode to control the beam electros...

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Veröffentlicht in:	Journal of applied physics 1991-05, Vol.69 (10), p.7283-7286
Hauptverfasser:	SANFORD, T. W. L, HALBLEIB, J. A, MCATEE, W. H, MIKKELSON, K. A, MOCK, R. C, POUKEY, J. W
Format:	Artikel
Sprache:	eng
Schlagworte:	430302 - Particle Accelerators- Injection & Extraction Systems ACCELERATORS BEAM CURRENTS BEAMS BREMSSTRAHLUNG CURRENTS DIODE TUBES DISTRIBUTION ELECTROMAGNETIC RADIATION ELECTRON BEAMS ELECTRON TUBES ENERGY RANGE Exact sciences and technology Instruments, apparatus, components and techniques common to several branches of physics and astronomy KILO AMP BEAM CURRENTS LEPTON BEAMS MEV RANGE MEV RANGE 10-100 PARTICLE ACCELERATORS PARTICLE BEAMS Physics PULSES RADIATIONS RELATIVISTIC RANGE SPATIAL DISTRIBUTION X- and γ-ray instruments and techniques
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Zusammenfassung:	Significantly improved spatial uniformity of bremsstrahlung radiation, relative to a planar-anode diode, is obtained on the HERMES III accelerator when a compound-lens diode is used to control the 19-MeV, 700-kA electron beam. The compound-lens diode uses a conical anode to control the beam electrostatically, followed by a gas cell with externally applied current to control the beam magnetically. Variation of the external current enables average doses at the target to be varied by a factor of 3 without breaking the vacuum system of the accelerator to change diode hardware.
ISSN:	0021-8979 1089-7550
DOI:	10.1063/1.347626