Note: Studies on target placement in TE{sub 111} cylindrical cavity of electron cyclotron resonance x-ray source for the enhancement of x-ray dose

Journal Article · Mon Mar 15 00:00:00 EDT 2010 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.3321496· OSTI ID:22053966

Selvakumaran, T S; Baskaran, R; Singh, A K ^[1]

---

1. Safety Group, Radiological Safety Division, Indira Gandhi Center for Atomic Research, Kalpakkam 603102 (India)

X-ray source based on electron cyclotron resonance principle has been constructed using TE{sub 111} cylindrical cavity. At present the device is used to provide low energy x-ray field for thermoluminescent dosimeter badge calibration. Theoretical and experimental studies on the effect of target placement inside the TE{sub 111} cylindrical cavity for enhancing the x-ray output are carried out and the results are presented in this note. Optimum target location is identified by theoretical analysis on the electric field distribution inside the cavity using MICROWAVE STUDIO program. By modifying the magnetic field configuration, the resonance region is shifted to the optimum target location. The microwave transmission line is upgraded with a three stub tuner which improves the microwave coupling from the source to the target loaded cavity. Molybdenum target is located at a radial distance of 2.5 cm from the cavity center and the x-ray dose rate is measured at 20 cm from the exit port for different microwave power. With the introduction of the target, the x-ray output has improved nearly from 70% to 160% in the microwave power of 150-500 W.

• OSTI ID: 22053966
• Journal Information: Review of Scientific Instruments, Vol. 81, Issue 3; Other Information: (c) 2010 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CALIBRATION
CAVITY RESONATORS
CYLINDRICAL CONFIGURATION
DOSE RATES
ELECTRIC FIELDS
ELECTRON CYCLOTRON-RESONANCE
MAGNETIC FIELD CONFIGURATIONS
MICROWAVE RADIATION
MOLYBDENUM
THERMOLUMINESCENT DOSEMETERS
X RADIATION
X-RAY SOURCES