On the properties of synchrotron-like X-ray emission from laser wakefield accelerated electron beams
- Univ. of Michigan, Ann Arbor, MI (United States); Univ. of California, San Diego, CA (United States)
- Univ. of Michigan, Ann Arbor, MI (United States)
- Univ. of Michigan, Ann Arbor, MI (United States); Osaka Univ. (Japan)
- Univ. of Michigan, Ann Arbor, MI (United States); Univ. of California, Irvine, CA (United States)
- Imperial College, London (United Kingdom)
The electric and magnetic fields responsible for electron acceleration in a Laser Wakefield Accelerator (LWFA) also cause electrons to radiate x-ray photons. Such x-ray pulses have several desirable properties including short duration and being well collimated with tunable high energy. We measure the scaling of this x-ray source experimentally up to laser powers greater than 100 TW. An increase in laser power allows electron trapping at a lower density as well as with an increased trapped charge. These effects ended in an x-ray fluence that was measured to increase non-linearly with laser power. The fluence of x-rays was also compared with that produced from K-α emission resulting from a solid target interaction for the same energy laser pulse. The flux was demonstrated to be comparable, but the LWFA x-rays had a significantly smaller source size. This indicates that such a source may be useful as a backlighter for probing high energy density plasmas with ultrafast temporal resolution.
- Research Organization:
- Univ. of Michigan, Ann Arbor, MI (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF)
- Grant/Contract Number:
- NA0002372
- OSTI ID:
- 1540178
- Alternate ID(s):
- OSTI ID: 1431156
- Journal Information:
- Physics of Plasmas, Vol. 25, Issue 4; ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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