SunShots

The idea remains the same, but I was not correct in the sense of “gamma ray detection,” but did advance the view to include “neutrinos in observation,” in regards to our view of the universe. Our Sun.

Hopefully, I am not making it confusing for some.

The coolest thing about this device is the extraordinarily wide field of view. The burst monitor can detect bursts basically in any direction that’s not hidden by the Earth, so a little over half the sky. The primary instrument will have maximal sensitivity for “only” around 1/5th of the sky at any given time. It will still detect gamma rays from other directions, but it won’t be nearly as good at pinning down their energies.

Calorimeters measure the collective behavior of particles traveling along approximately the same path, and are thus naturally suited for the measurement of jets-Dorigo Tommaso

I had been following Glast history as well, and the relationship I thought the “PI institute” held in regards to a “time value measurement position” in regards to Phenomenological order to progressing science. This may be a mistaken notion on my part. I thought Lee Smolin was leading in this area and thought the Glast experiment important to his position.

Longitudinal and Transverse Information about the Energy Deposition Pattern

The calorimeter design for GLAST produces flashes of light that are used to determine how much energy is in each gamma-ray. A calorimeter (”calorie-meter”) is a device that measures the energy (heat: calor) of a particle when it is totally absorbed. CsI(Tl) bars, arranged in a segmented manner, give both longitudinal and transverse information about the energy deposition pattern. Once a gamma ray penetrates through the anticoincidence shield, the silicon-strip tracker and lead converter planes, it then passes into the cesium-iodide calorimeters. This causes a scintillation reaction in the cesium-iodide, and the resultant light flash is photoelectrically converted to a voltage. This voltage is then digitized, recorded and relayed to earth by the spacecraft’s onboard computer and telemetry antenna. Cesium-iodide blocks are arranged in two perpendicular directions, to provide additional positional information about the shower.

I have been interested in “calorimetric designs” when I first heard of it in the Glast design.

Understanding this use in the LHC and hearing of the “onion skin metaphor” was a strange thought, but seems indeed to explain this ability to measure?

Calorimeters for High Energy Physics experiments – part 1
Calorimeters for High-Energy Physics – part 2 April 11, 2008

Tammaso Dorigo gave a nice blog posting in that regard that might give greater clarity to the values of these measures, as well, helps one view the “window of the universe” in a new ways. A point here was the the gamma ray view of the sun some time ago by JoAnne in this Blog.

While we have ground based measures this allows us to look back at space, and see it in this different light. It all started with the “Fly’s eye?”:) Pierre Auger history, and John Bachall lead in these directions.

There are hand-waving arguments that LQG should lead to violations of Lorentz invariance that will be testable by GLAST,

I think this may be one place where LQG goes astray. There are some LQG ideas about the speed of light being variable near the Planck length. Yet, the speed of light is just a way of telling us how much space equals how much time. It is a proportion, and variable c amount to loopiness where time depends on space, but where that dependency depends further on space and … . Yuck. The breaking of Lorentz invariance also goes against the grain of symmetry “recovery” at higher energy.

Lawrence B. Crowell

But won’t they be traveling faster in high density areas due to gravity, and thus covering more area/unit time?