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Telescope Array: Status and Upgrades John Belz University of Utah - - PowerPoint PPT Presentation
Telescope Array: Status and Upgrades John Belz University of Utah - - PowerPoint PPT Presentation
Telescope Array: Status and Upgrades John Belz University of Utah Snowmass on the Mississippi Minneapolis, 30 July 2013 Outline Telescope Array Overview Detector Physics TA Upgrades TALE TA x 4 NICHE TA
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Outline
- Telescope Array Overview
– Detector – Physics
- TA Upgrades
– TALE – TA x 4 – NICHE
- TA Affiliate Experiments
– ELS – TARA – Lightning Detection
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SD/FD Energy Scale
First estimate of SD Energy: MC lookup table
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Composition: Stereo Xmax
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TA Upgrades
- Low-energy
extension; TALE
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TA Low Energy Extension (TALE)
- Study 1016 and 1017 eV
decades in hybrid
- Astrophysics
– End of “knee” – Second knee – Galactic-Extragalactic Transition
- High-energy physics: Cross-
section measurements
- verlapping LHC
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TALE Detectors
are being deployed.
TALE infill array TA SD
TALE hybrid events per year TA mirrors TALE mirrors LHC energy TALE FD at MD
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TALE: P-Air Total Cross Section at LHC Energies
The falling tail is a convolution
- f the first-interaction
exponential and the variation
- f depth of Xmax.
Figure: PAO
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Unresolved by TA: Anisotropy
- Map of a priori significance
for TA events > 57 EeV
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TA Upgrades
- TA x 4
- 3,000 km2
– 500 SD's, 2 km spacing – 1 new FD (HiRes refurbished)
- Proposals fall 2013
- Anisotropy: 20 TA-
SD years by 2019
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Telescope Array Affiliate Experiments
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TARA: Radar Detection of Cosmic Ray Showers
- Low rates at high energies
→ need aperture!
- Bistatic radar
– Remote sensing – Inexpensive – 100% duty cycle
54.1 MHz, 8 MW ERP phased array Simulated “chirp” detected at -10 dB SNR
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TA/LMA: Lightning Mapping
- Cosmic rays may trigger
lightning strikes.
- Lightning does emit air
shower-like bursts of particles.
- Proposing to deploy
lightning mapping array (LMA) at TA to study these phenomena.
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Summary
- Telescope Array is the largest cosmic ray
- bservatory in the Northern Hemisphere.
- Has measured spectrum, composition and
anisotropy above 1018 eV.
- Planned upgrades will:
– Increase aperture x4 (anisotropy) – Increase range to nearly 5 orders of magnitude(!) – Measure cross-sections at LHC energies
- Rich program of affiliate experiments