140J, 225kV, 6kA, Flash X-ray generator is used for radiography of different materials to detect any defect. FXR generator consists of 225kV, 6kA, 15 stages Marx Generator generating pulse of duration 150ns and rise time of 50ns using Folded Pulse Forming Line that has been developed indigenously. It utilizes FPFL based high voltage Max generator and cold cathode, two-electrode vacuum tube to generate short and intense bursts of hard X-ray. The radiation intensity produced by an accelerated beam of paraxial electrons varies over a wide voltage range.

SALIENT FEATURES

• It is an attractive scheme to generate power source for high power pulsed electron beam.
• It has higher power output, compactness, reliable & low cost over conventional Marx generator.
• FXR provides precision, reproducibility with minimum human error.

APPLICATION

• FXR can be used for radiography of different metallic samples.
• Transient chemical reactions of various materials, sub-microseconds photo chemistry and flash radiography.
• Study of material properties of commonly used targets such as iron, cobalt, nickel, zirconium and molybdenum by measuring their dose response for different dosimeter positions.

140J, 225kV, 6kA, Flash X-ray generator is used for radiography of different materials to detect any defect. FXR generator consists of 225kV, 6kA, 15 stages Marx Generator generating pulse of duration 150ns and rise time of 50ns using Folded Pulse Forming Line that has been developed indigenously. It utilizes FPFL based high voltage Max generator and cold cathode, two-electrode vacuum tube to generate short and intense bursts of hard X-ray. The radiation intensity produced by an accelerated beam of paraxial electrons varies over a wide voltage range.

APPLICATION

• FXR can be used for radiography of different metallic samples.
• Transient chemical reactions of various materials, sub-microseconds photo chemistry and flash radiography.
• Study of material properties of commonly used targets such as iron, cobalt, nickel, zirconium and molybdenum by measuring their dose response for different dosimeter positions.
• Thermal neutron dose measurement with boron in self reading dosimeters, lithium fluoride and calcium fluoride with a small amount of manganese in thermo luminescent dosimeters.
• Dosimeter material development, evaluating the response time and saturation level.

ADVANTAGES

• It is an attractive scheme to generate power source for high power pulsed electron beam.
• It has higher power output, compactness, reliable & low cost over conventional Marx generator.
• FXR provides precision, reproducibility with minimum human error.

SPECIFICATIONS

(I) Folded Pulse Forming Line (FPFL)

• Capacitance = 21nF±10%
• Working voltage = 30kVDC
• Maximum voltage reversal = 20%

(II) Marx Generator

• Max. output across matched load= 225kV
• Peak current = 6kA
• Energy =  140J
• Pulse Duration = 150ns

(III) Flash X-ray tube

• Pulse duration = 25ns-50ns
• Penetration of steel @ 2.5m film to source distance = 34mm
• Dose per pulse @ 1 m from the tube window =  25 mR

INFRASTRUCTURE REQUIRED

Electrical Requirements :

• Power  (Convenience) : Combined 5/15 A, 1 Phase, 230V, 50 Hz

• Equipment Power
  1. Marx Generator charging power supply : 3 Phase, 415V,16 A
  2. Control system                                             : 230V, 50Hz, 5A, 1 phase
• Separate earthing of less than 10hms is required for Marx generator control system.

Space :

• 6m x 6m space is required for assembly, testing & installation of the   FXR System.

MATERIAL AVAILABILITY

• Raw materials are locally available except Flash X-ray tube is imported through local agent.

MANPOWER

• An electrical engineer, a mechanical engineer & 2 trained technicians will be required for the development of this instrument.