MeV particles from laser-initiated processes in ultra-dense deuterium D(−1)
Författare och institution:
Leif Holmlid (Institutionen för kemi och molekylärbiologi)
Publicerad i:
European Physical Journal A, 48 ( 2 ) s. artikel nr 11
ISSN:
1434-6001
Publikationstyp:
Artikel, refereegranskad vetenskaplig
Publiceringsår:
2012
Språk:
engelska
Fulltextlänk:
Sammanfattning (abstract):
Fast particles from laser-induced processes in ultra-dense deuterium D(−1) are studied. The
time of flight shows very fast particles, with energy above MeV. Such particles can be delayed or prevented
from reaching the detector by inserting thin or thick metal foils in the beam to the detector. This distinguishes
them from energetic photons which pass through the foils without delays. Due to the ultra-high
density in D(−1) of 1029 cm
−3, the range for 3MeV protons in this material is only 700 pm. The fast
particles ejected and detected are thus mainly deuterons and protons from the surface of the material.
MeV particles are expected to signify fusion processes D+D in the material. The number of fast particles
released is determined using the known gain of the photomultiplier. The total number of fast particles
formed, assuming isotropic emission, is less than 109 per laser pulse at < 200mJ pulse energy and intensity
1012Wcm
−2. A fast shockwave with 30 keVu
−1 kinetic energy is observed.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
NATURVETENSKAP ->
Fysik ->
Subatomär fysik ->
Elementarpartikelfysik ->
Jonfysik
NATURVETENSKAP ->
Fysik ->
Fusion, plasma och rymdfysik ->
Plasmafysik
NATURVETENSKAP ->
Fysik ->
Fusion, plasma och rymdfysik ->
Fusion
Fysik ->
Subatomär fysik ->
Elementarpartikelfysik ->
Jonfysik
NATURVETENSKAP ->
Fysik ->
Fusion, plasma och rymdfysik ->
Plasmafysik
NATURVETENSKAP ->
Fysik ->
Fusion, plasma och rymdfysik ->
Fusion
Nyckelord:
Fusion, ultra-dense deuterium, MeV particles, protons
Postens nummer:
157731
Posten skapad:
2012-05-17 17:21
Posten ändrad:
2012-05-18 13:13