Related Experiment Videos
Radiation protection for an ultra-high intensity laser
F Borne1, D Delacroix, J M Gelé
1CEA DAM-Ile-de-France, Service de Protection contre les Rayonnements, Bruyères-le-Châtel. francois.borne@cea.fr
Radiation Protection Dosimetry
|September 6, 2002
Summary
Ultra-high intensity laser facilities generate significant X ray, gamma, and neutron radiation. Careful radiological risk assessment and access control are essential for safety in these advanced laser environments.
Area of Science:
- Nuclear Physics
- Laser Technology
- Radiation Safety
Background:
- Ultra-high intensity lasers are rapidly advancing.
- These facilities present potential radiological hazards.
Purpose of the Study:
- To characterize radiation levels in an experimental chamber of a terawatt laser facility.
- To assess radiological risks associated with ultra-high intensity laser operations.
Main Methods:
- Utilized thermoluminescent dosimeters (TLD), photographic film, bubble detectors, and germanium spectrometry.
- Conducted radiological measurements during 150 laser shots (300 fs) with energies from 1-20 J and illuminance of 10(19) W/cm².
Main Results:
- Significant X ray, gamma, and neutron radiation detected.
- Gamma dose equivalents ranged from 0.7 to 73 mSv near the chamber.
- Neutron dose equivalent was approximately 1% of the gamma dose equivalent.
- No chamber or target holder activation/contamination observed.
Conclusions:
- Radiation levels are dependent on laser energy and target material.
- Radiological risks must be integrated into the design of ultra-high intensity laser facilities.
- Clear personnel access conditions are necessary for safety.