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- Newsgroups: sci.electronics
- Path: sparky!uunet!news.larc.nasa.gov!grissom.larc.nasa.gov!kludge
- From: kludge@grissom.larc.nasa.gov ( Scott Dorsey)
- Subject: Re: Airport X-Rays
- Message-ID: <Bs5o1E.2G9@news.larc.nasa.gov>
- Sender: news@news.larc.nasa.gov (USENET Network News)
- Organization: NASA Langley Research Center and Reptile Farm
- References: <22754@oasys.dt.navy.mil> <4836@unixhub.SLAC.Stanford.EDU> <1992Jul29.084952.12730@bronze.ucs.indiana.edu>
- Date: Wed, 29 Jul 1992 14:53:37 GMT
- Lines: 22
-
- In article <1992Jul29.084952.12730@bronze.ucs.indiana.edu> dny@humus.cs.huji.ac.il (Danny Halamish) writes:
- >|> X-rays), but is there real danger to EPROMs ?
- >|>
- >A friend of mine just returned from taiwan with two 486 boards, with bios and
- >all. Both have survived the X - rays.
- >
- >I have had audio tapes X-rayed in airports several times and did not notice
- >any differnce.
-
- X-rays will not harm magnetic tapes at all. However, the enormous magnets
- that X-ray tubes use to focus their electron beam might very well damage
- tapes. On the other hand, the magnetic field drops off very rapidly
- (by the cube of the distance, right?) so it's probably not a big issue.
- I always get tapes hand inspected, but I carry around a lot of audio
- masters and tend to get paranoid.
-
- X-rays can erase EPROMS, but the dosage has to be extremely high. Your
- friendly neighborhood airport machine won't harm them, but a few days under
- a high power industrial X-ray might knock a few bits out of place. X-rays
- will disrupt them while in operation, so turn things off before running
- them through the X-ray machine unless you mind your system crashing.
- --scott
-