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# SURF: Announcements of Opportunity

Below are Announcements of Opportunity posted by Caltech faculty and JPL technical staff for the SURF program. Additional AOs for the Amgen Scholars program can be found here.

Specific GROWTH projects being offerred for summer 2018 can be found here.

Each AO indicates whether or not it is open to non-Caltech students. If an AO is NOT open to non-Caltech students, please DO NOT contact the mentor.

Announcements of Opportunity are posted as they are received. Please check back regularly for new AO submissions! Remember: This is just one way that you can go about identifying a suitable project and/or mentor.

Announcements for external summer programs are listed here.

## Students pursuing opportunities at JPL must beU.S. citizens or U.S. permanent residents.

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Project:  Time reversal violation in nuclear beta decay
Disciplines:  Physics, Applied Physics
Mentor:  John Behr, TRIUMF Scientist, (PMA), behr@triumf.ca, Phone: 604-222-1047 x6371
Mentor URL:  https://www.phas.ubc.ca/users/john-behr  (opens in new window)
Background:  NOTE: This project is being offered by a Caltech alumnus and will be conducted at TRIUMF, a Canadian national laboratory located in Vancouver, British Columbia, Canada.

TRIUMF's atom trap for beta decay has tested the standard model of particle physics by measuring the angular correlation between the emitted electron and neutrino, the latter deduced from the low-energy recoiling nucleus by momentum conservation. We are now pursuing a time-reversal symmetry test, by also measuring the gamma-ray sometimes emitted.
Description:  The student would develop and calibrate the gamma-ray detectors, which would use a new type of scintillator with high light output and very fast timing, and readout insensitive to the atom trap’s magnetic field.
References:  Review with some qualitative review on atom traps for this purpose:
Standard model tests with trapped radioactive atoms', J.A. Behr and G. Gwinner, J.Phys. G: Nucl. Part. Phys. 36 (2009) 033101 or arXiv:0810.3942v3

General public web story:
http://www.triumf.ca/research-highlights/experimental-result/looking-for-wrong-handed-neutrinos

APS talk on the time-reversal experiment:
https://trinat.triumf.ca/publications-1/trv_april_169.pdf

Technical proposal for the time reversal: