Bremsstrahlung converter debris shields: test and analysis
Electron beam accelerators are commonly used to create bremsstrahlung x-rays for effects testing. Typically, the incident electron beam strikes a sandwich of three materials: (1) a conversion foil, (2) an electron scavenger, and (3) a debris shield. Several laboratories, including Sandia National Laboratories, are developing bremsstrahlung x-ray sources with much larger test areas (approx. 200 to 500 cm/sup 2/) than ever used before. Accordingly, the debris shield will be much larger than before and subject to loads which could cause shield failure. To prepare for this eventuality, a series of tests were run on the Naval Surface Weapons Center's Casino electron beam accelerator (approx. 1 MeV electrons, 100 ns FWHM pulse, 45 kJ beam energy). The primary goal of these tests was to measure the stress pulse which loads a debris shield. These measurements were made with carbon gages mounted on the back of the converter sandwich. At an electron beam fluence of about 1 kJ/cm/sup 2/, the measured peak compressive stress was typically in the 1 to 2 kbar range. Measured peak compressive stress scaled in a roughly linear manner with fluence level as the fluence level was increased to 10 kJ/cm/sup 2/. The duration of the compressive pulse was on the order of microseconds. In addition to the stress wave measurements, a limited number of tests were made to investigate the type of damage generated in several potential shield materials.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5609801
- Report Number(s):
- SAND-83-0110; ON: DE84002147
- Country of Publication:
- United States
- Language:
- English
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ARAMIDS
BEAM CURRENTS
BEAMS
BREMSSTRAHLUNG
CURRENTS
DATA
DYNAMIC LOADS
ELECTROMAGNETIC PULSES
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ENERGY RANGE
EXPERIMENTAL DATA
INFORMATION
KILO AMP BEAM CURRENTS
LEPTON BEAMS
MATERIALS
MATERIALS TESTING
MEV RANGE
MEV RANGE 01-10
NUMERICAL DATA
PARTICLE BEAMS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
PULSES
RADIATIONS
SHIELDING
SHOCK WAVES
SIMULATION
STRESSES
SYNTHETIC MATERIALS
TARGETS
TESTING