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Choices of laser cooling include the ones you mentioned plus a third:
1. tap water
2. chiller (presumably refrigerated)
3. closed recirculated loop with heat exchanger cooled by tap water
Off the top my head, advantages and disadvantages include:
tap water:
+ easy to do, no expensive hardware involved; in-line filters easily get rid
of particulates (if lots, then two in series: one coarse, one finer)
- expensive if you water costs are high, variable temperature depending on
source, variable pressures--typically low (but can be regulated), in poorly
done plumbing, toilet flushes can trip the pressure sensor; may have high
mineral content requiring ion-exchange column upstream from laser
chiller:
+ pressure/temp easy to regulate, convenient
- can be very expensive: not just the unit itself, but you have to blow off a
considerable amount of heat somewhere, so higher installation costs
cooled-recirculator
+ isolates lasers from grunge in water, pressure independent of tap water;
should be less expensive than refrigerated unit, generally simpler
installation
- still dependent on tap water temperature and pressure insofar as keeping a
fast enough flow rate to carry away heat; still have to deal with pumps;
probably have to filter incoming tap water
Laser manufacturers provide the above, perhaps at higher prices. A look
through a laser trade journal will turn up some other sources, as well as a
look at industrial cooling system suppliers.
Dave Coder
dcoder@u.washington.edu
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CD-ROM Vol 3 was produced by Monica M. Shively and other staff at the
Purdue University Cytometry Laboratories and distributed free of charge
as an educational service to the cytometry community.
If you have any comments please direct them to
Dr. J. Paul Robinson, Professor & Director,
PUCL, Purdue University, West Lafayette, IN 47907.
Phone: (765)-494-0757;
FAX(765) 494-0517;
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