Journal
PHYSICAL REVIEW LETTERS
Volume 106, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.106.014801
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Funding
- Libra Basic Tech.
- U.S. DOE [DE-FG02-07ER41488]
- EPSRC [EP/E035728/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/E035728/1] Funding Source: researchfish
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We report on the acceleration of impurity-free quasimononenergetic proton beams from an initially gaseous hydrogen target driven by an intense infrared (lambda = 10 mu m) laser. The front surface of the target was observed by optical probing to be driven forward by the radiation pressure of the laser. A proton beam of similar to MeV energy was simultaneously recorded with narrow energy spread (sigma similar to 4%), low normalized emittance (similar to 8 nm), and negligible background. The scaling of proton energy with the ratio of intensity over density (I/n) confirms that the acceleration is due to the radiation pressure driven shock.
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