On Oct 27, 2009, at 1:39 PM, Abd ul-Rahman Lomax wrote:
If anyone is already set up and running codeposition or other LENR
expriments, and would like to try using LR-115, I can provide small
quantities of fresh material at a reasonable price, contact me. You
can buy the material directly from France, if anyone wants to buy
it in the minimum order, which is 25 9x12 cm sheets of 6 micron red
cellulose acetate on 100 microns of clear polyester, I paid about
$350, all things considered, for the package delivered to me. I
also have some Boron-10 neutron converter screen which will convert
thermal and epithermal neutrons to alpha radiation.
What are your prices?
It may be useful to test or calibrate your LR-115 with known particle
sources before employing it in actual CF experiments. It appears to
be used for fairly high energy particles and/or massive particles,
like radon and thoron measurement. It might be good to check it out
against a proton source.
Do you have an intended protocol for developing LR-115?
Just some misc. notes follow.
LR-115 general information and instructions for use:
http://pagespro-orange.fr/dosirad/Notice%20LR115-A.htm
Looks like the etching protocol is somewhat similar to CR-39, even
though LR-115 is cellulose nitrate based.
It appears stirring has a significant effect (2 x) on etch rate:
http://www.cityu.edu.hk/ap/nru/pub_j79.pdf
Side note: utlrasonics might be used to increase development time.
Humidity has a 20% effect on track diameter and also affects etch rate:
http://cat.inist.fr/?aModele=afficheN&cpsidt=3554027
Probably not good to put it into water.
LR-115 has some interesting but probably not important sensitivities
(dielectric constant, conductivity, glass transition temperature) to
gamma radiation:
http://www3.interscience.wiley.com/journal/104064351/abstract?
CRETRY=1&SRETRY=0
The fact it has conductivity makes it possibly useful for HV field
bias experiments - right up close to the action.
Sensitivity of CR-39 and LR-144 differs:
http://www.osti.gov/energycitations/product.biblio.jsp?
osti_id=5549887#at
It is of possible interest that Makrofol polycarbonate film is used
for light ion detection in a similar manner:
http://www.sciencedirect.com/science?
_ob=ArticleURL&_udi=B6TVS-3YF44MN-3&_user=10&_rdoc=1&_fmt=&_orig=search&
_sort=d&_docanchor=&view=c&_searchStrId=1067056757&_rerunOrigin=google&_
acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=fabb46ccecdcc1ab
514d2e57c0e9ce85
http://tinyurl.com/yfewrfs
but Markrofol development can be complicated:
http://cat.inist.fr/?aModele=afficheN&cpsidt=2382448
Markrofol is useful for detection of neutrons and 0.5 MeV - 4 MeV
alphas:
http://rpd.oxfordjournals.org/cgi/content/abstract/34/1-4/25
Available at:
http://www.google.com/search?client=safari&rls=en&q=Makrofol+film
+price&ie=UTF-8&oe=UTF-8
http://tinyurl.com/ylpcurg
It is not so cheap either.
Thin films can be prepared by dissolving Markrofol in chloroform.
Best regards,
Horace Heffner
http://www.mtaonline.net/~hheffner/
