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- Path: sparky!uunet!stanford.edu!agate!dog.ee.lbl.gov!csa1.lbl.gov!sichase
- From: sichase@csa1.lbl.gov (SCOTT I CHASE)
- Newsgroups: sci.physics
- Subject: Re: Magnetic monopoles?
- Date: 24 Jan 1993 10:00 PST
- Organization: Lawrence Berkeley Laboratory - Berkeley, CA, USA
- Lines: 36
- Distribution: world
- Message-ID: <24JAN199310005835@csa1.lbl.gov>
- References: <1993Jan20.025101.9082@CSD-NewsHost.Stanford.EDU> <Jan.20.15.06.45.1993.6113@ruhets.rutgers.edu> <1993Jan23.032445.4376@lehi3b15.CSEE.Lehigh.EDU>
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- In article <1993Jan23.032445.4376@lehi3b15.CSEE.Lehigh.EDU>, glipton@po.CWRU.Edu writes...
- >
- >In 1983 (I think) Cabrera of Stanford ran an experiment to detect
- >monopoles. The experiment detected one event which had a virtually
- >perfect signature for a monopole. This event occurred on a Sunday
- >when no one was monitoring the apparatus. The event was, as far as
- >I know, never explained and never repeated.
-
- Closer to early 1982. In the spring on 1982 I was in a freshman EM class
- at MIT where Alan Guth declared that div B = 0 (Except at Stanford) as one
- of Maxwell's equations.
-
- Although nobody was ever able to explain the mystery event, Cabrera has
- since has new ones of the same kind. His new detectors are coincidence
- detectors. The original one was a single superconducting loop. The
- newer ones are several loops, organized rather like the plastic loops on
- a six-pack of soda, with two sets stacked one on top of the other.
- If a monopole passes through one loop of the upper set, it will, with
- high probability, pass through the corresponding loop in the lower set.
- A valid monopole signal thus requires a coincidence of two loops. However,
- during several years of running, Cabrera et.al. have had at least one
- singles event, i.e., a single loop fired in the same way as the original
- mystery signal - only this time there was a lower loop which did not fire
- to veto the event as unambiguous, though unexplained, noise.
-
- Based upon this experience, Cabrera has, in a paper (last year, if I
- remember correctly) in PRL, officially retracted his original mystery
- event as a possible monopole signal.
-
- -Scott
- --------------------
- Scott I. Chase "It is not a simple life to be a single cell,
- SICHASE@CSA2.LBL.GOV although I have no right to say so, having
- been a single cell so long ago myself that I
- have no memory at all of that stage of my
- life." - Lewis Thomas
-