We have recently (9/99) taken data using an electron linac Argonne Wakefield Accelerator :
(Accepted by Phys. Rev. E)
SLAC seminar (5/23/00) (this is accelerator half of the seminar, PG gave 1st half on Goldstone)
We used the Argonne Wakefield Accelerator to test the properties of emission from a short (~50 picosecond) bunch of 1010 electrons at 15.2 MeV. This approximates the electrons in shower-max of a 1021 eV neutrino shower.
We dumped the electron beam into a bucket containing
800 pounds of silica sand. We used an S-band
horn to measure the microwave energy from 1.7 to 2.6 GHz.
We saw whopping signals, no amplifiers were needed, just attenuators.
The following is a typical pulse (volts. vs. nseconds) read directly
by a TDS694 oscilloscope:
We are currently writing up our results. In the meantime,
visit our photo gallery: