Speakers
Prof.
Peter Gorham
(High Energy Physics Group, UH Manoa)Mr
Remy Prechelt
(High Energy Physics Group, UH Manoa)
Description
We report results from the Askaryan Calorimeter Experiment (ACE), which uses coherent microwave Cherenkov emission from showers passing through Alumina dielectric-loaded waveguides to provide timing fiducials of 2-3 ps per detector element. The "calorimeter" part of ACE is a historical misnomer, since it has a relatively high shower threshold of several hundred GeV. However, in the forward direction at a 100 TeV collider, beyond a pseudorapidity of 3 or 4, a ~10-cm thick timing plane of ACE elements will see any showering particle of Pt>10-30 GeV, providing ~1 picosecond timing resolution for photons, charged leptons, and even hadrons. In addition, at ~2m out from the vertex region, the picosecond timing gives shower core positions to 100 microns precision along the 1~m ACE elements. The corresponding angular resolution is 10 arcseconds in theta, along with 6 arcminute resolution in phi due to the 6mm width of the WR51 waveguide elements.
ACE is an unconventional but potentially transformative detector technology which will be most relevant at the extremely-high center-of-mass energies on the future collider horizon. Picosecond or better timing, enabling true 4-D tracking, is crucial for reduction of pileup, a challenging problem at 100 TeV. ACE detectors are extremely simple in design, extremely rad-hard in operation, with extreme dynamic range, limited only by the digitizers in the back end. And as shower calorimeters, they may actually even be useful at the highest energies when other detector technologies have saturated.
Summary
This paper reports on development of picosecond timing planes using the Askaryan effect -- coherent microwave Cherenkov emission -- in compact, dielectric-loaded waveguides. These will be applicable to future collider instruments.
Primary author
Prof.
Peter Gorham
(High Energy Physics Group, UH Manoa)
Co-authors
Dr
Carsten Hast
(SLAC)
Mr
Christian Miki
(High Energy Physics Group, UH Manoa)
Prof.
Gary Varner
(UH Manoa)
Mr
Remy Prechelt
(High Energy Physics Group, UH Manoa)
