With the advent of the large, sophisticated spark chambers such as COS-B and EGRET, high-energy gamma-ray astronomy has gone from being a discipline for instrumental specialists to being an integrated part of multiwavelength astronomy. ... Given the paucity of photons at higher gamma-ray energies, it is very important to...
imagine.gsfc.nasa.gov/docs/science/how_l2/pair_telescop... imagine.gsfc.nasa.gov/docs/science/how_l2/pair_telescopes.html
In the past, balloon flights typically remained at float altitude from several hours to one or two days, at best. Nowadays, however, ... He won the Nobel Prize for Physics in 1927 for his work on the scattering of high-energy photons by electrons - which is something very basic to most gamma-ray detection techniques.
imagine.gsfc.nasa.gov/docs/science/know_l1/history_gamm... imagine.gsfc.nasa.gov/docs/science/know_l1/history_gamma.html
"This measurement eliminates any approach to a new theory of gravity that predicts a strong energy-dependent change in the speed of light," said Peter Michelson, professor of physics at Stanford University and principal investigator for Fermi's Large Area Telescope (LAT), which detected the gamma-ray photons on May 10.
www.sciencedaily.com/releases/2009/10/091028153447.htm www.sciencedaily.com/releases/2009/10/091028153447.htm
GLAST: A Next Generation Orbiting High-Energy Gamma-Ray Telescope ... In particular, the high-energy physics requirements for 4p sr coverage of collision regions at accelerators, ... The background assumed is 2 x 10-5 photons cm-2 s-1 sr-1 (100 MeV/E)1.1, typical of the background seen by EGRET at high galactic latitudes.
www-glast.stanford.edu/studyprop/overview.html
23 November 2009 - CERN; Two circulating beams bring first collisions in the LHC ... 9 December 2009 - Business Week; Atom smasher catches 1st high-energy collisions ... 29 October 2009 - Discover Magazine; A Gamma Ray Race Through the Fabric of Space-Time Proves Einstein Right...
www.interactions.org/
There are strong reasons to believe that the Higgs may be relatively low mass, ~130 GeV, and therefore could be discovered by its expected decay into two high energy photons. ... The crystal quality is crucial to meet CMS physics requirements. ... Silicon detectors using APV readout have also been used in x-ray imaging projects.
www.imperial.ac.uk/research/hep/research/cms.htm
For example, in the past we have learned that the electromagnetic and weak forces are two components of a single force, ... The goal of the Department's High Energy Physics (HEP) program, ... Electromagnetic calorimeters, also called shower counters or gamma ray detectors, must be optimized for photons with energies above 1 GeV.
www.science.doe.gov/sbir/Solicitations/FY%202003/HEP.ht... www.science.doe.gov/sbir/Solicitations/FY%202003/HEP.htm
Two key findings are mentioned here. First, a consensus is emerging in the plasma physics and astrophysics communities that many opportunities exist for significant advances in understanding the physics of high energy density plasmas through an integrated approach to investigating the scientific issues in related subfields.
www.nap.edu/books/030908637X/html/
HESS J0632+057 is one of only two unidentified very-high-energy gamma-ray sources which appear to be point-like within experimental resolution.
cherenkov.physics.iastate.edu/publications.html cherenkov.physics.iastate.edu/publications.html
AIP Conference Proceedings Subseries: Nuclear and High Energy Physics ... CAPTURE GAMMA-RAY SPECTROSCOPY AND RELATED TOPICS: Proceedings of the 13th International Symposium on Capture Gamma-Ray Spectroscopy and Related Topics...
proceedings.aip.org/proceedings/volume.jsp?key=APCPCS&s... proceedings.aip.org/proceedings/volume.jsp?key=APCPCS&scode=NHEP