That will only work at the time you get there, which may not be the time of the experiment.
I think they need a more permanent solution. Didier KO4BB Sent from my BlackBerry Wireless thingy while I do other things... -----Original Message----- From: "Bob Camp" <[email protected]> Sender: [email protected] Date: Mon, 24 Oct 2011 13:03:58 To: 'Discussion of precise time and frequency measurement'<[email protected]> Reply-To: Discussion of precise time and frequency measurement <[email protected]> Subject: Re: [time-nuts] Neutrino timing Hi The "quick and dirty" way to improve the timing is pretty old school. Toss a modern Cesium clock in the back of a car along with a bunch of batteries. Drive it back and forth between Batavia and Soudan. If you drive fast, that should be about an 8 hour trip. A good Cesium should hold 5 to 10X better than the GPS is now doing. Bob -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Marvin Marshak Sent: Monday, October 24, 2011 11:53 AM To: [email protected] Subject: [time-nuts] Neutrino timing Good morning, Recently physicists using a neutrino beam from Geneva Switzerland to the Gran Sasso in Italy have reported a measurement of neutrino velocity that is faster than the speed of light. The effect over a 730 km path length is reported as 60 ns, which means that precise timing is required at both ends of the beam to have sensitivity to this effect. The reported result, if true, has major implications for the fundamental understanding of physics. Thus, it is important to carry out independent checks of this measurement. A similar beam exists between Fermi National Accelerator Lab in Batavia IL and the University of Minnesota's Underground Laboratory at Soudan in northeastern Minnesota. This U.S. beam has been used to make a similar measurement, but the GPS timing equipment that was used (Truetime XL-AK, Model 600-101-015) resulted in an estimated uncertainty of about 70 ns in the neutrino time-of-flight, too large to test the recently reported effect. I am one of a group of physicists working with the neutrino beam in the U.S. Although we are also talking with professionals at USNO and NIST, I am interested in possible suggestions from the "Time Nut" community with respect to the following: (a) the possibility of retrospectively improving the existing timing data recorded since 2005 using the Truetime XL-AK, and (b) a quick, low-cost improvement in the timing instrumentation that can be made right away, pending arrangements for techniques such as Two-Way Satellite synchronization. In addition, if there are any "Time Nuts" in the Minnesota area who would like to get more involved in this project, please feel free to contact me at [email protected] Thank you very much. Marvin Marshak Marvin L. Marshak College of Science and Engineering Professor Morse-Alumni Professor University of Minnesota 116 Church Street SE Minneapolis MN 55455 612-624-1312 612-624-4578 (fax) _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
