This is interesting, but lead fluoride is a very different substance
from lead glass. The GlueX lead glass is designated as SF3. For an
interesting comparison of lead fluoride with lead glass and other
alternatives, see the following link.
http://lss.fnal.gov/archive/test-tm/1000/fermilab-tm-1602.pdf
Richard Jones
Simon Taylor wrote:
> Some information about curing crystals with light from the Mainz A4 group.
>
> Simon
>
>
> ---------- Forwarded message ----------
> Date: Fri, 5 Oct 2007 12:35:35 +0200 (CEST)
> From: Sebastian Baunack <baunack@kph.uni-mainz.de>
> To: Simon Taylor <staylor@jlab.org>
> Subject: Re: crystal curing
>
>
> Hi Simon,
>
> For the crystal curing:
> We use fluorescent lamps, so called "energy saving lamps" of the type "Osram Dulux L 24W/67 blue". They give a light flux of 550 lm and a light power of 40 cd. As the name says, they produce blue light.
>
> We install the lamps usually after four weeks of beam, so practically after two runs. As far as I can judge it, the crystals are recovered fully. I can see that on the calibration: The high voltages after curing go back to the same values they had after the preceeding curing.
>
> There is a NIM paper on the PbF2 crystals which includes some words on the curing:
>
> "Radiation resistance and optical properties of lead fluoride Cherenkov
> crystals"
> P. Achenbach et al. 1998,
> Nucl.Instrum.Meth.A416:357-363,1998.
>
> You can find this article with Spires. If there's a problem, you can find
> the postscript file also on our webpage ("Veröffentlichungen").
>
>
>
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