<div dir="auto">Thanks Ilan. I was recently in contact with <a href="mailto:jiri.parizek@crytur.cz">jiri.parizek@crytur.cz</a> at CRYTUR for thin single crystal x-ray scintillators.<div dir="auto"><br></div><div dir="auto">Alan<br><div data-smartmail="gmail_signature" dir="auto">______________________________________________________<br> Dr Alan Hewat, NeutronOptics, Grenoble, FRANCE <br> from my telephone<br><Alan.Hewat@NeutronOptics.com> +33.476.98.41.68<br> <a href="http://www.NeutronOptics.com/hewat">http://www.NeutronOptics.com/hewat</a><br>______________________________________________________</div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, 18 Dec 2019, 12:23 Ilan Mor, <<a href="mailto:ilmor@soreq.gov.il">ilmor@soreq.gov.il</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Alan,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Initially we bought our 20 cm x 20 cm fiber screen (0.5mm fibers, 3cm thick) from Saint-Gobain.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Later on, a similar screen was purchased from Crytur. It had less defects and much faster delivery time.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I believe that a larger screen with 250um fibers can be made. One has to discuss this with the relevant companies.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Regards,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Ilan <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><b><span lang="HE" dir="RTL" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">מאת</span></b><span dir="LTR"></span><span dir="LTR"></span><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""><span dir="LTR"></span><span dir="LTR"></span>:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
Alan Hewat [mailto:<a href="mailto:alan.hewat@neutronoptics.com" target="_blank" rel="noreferrer">alan.hewat@neutronoptics.com</a>] <br>
<b><span lang="HE" dir="RTL">נשלח</span><span dir="LTR"></span><span dir="LTR"></span><span dir="LTR"></span><span dir="LTR"></span>:</b>
<span lang="HE" dir="RTL">יום ד 18 דצמבר 2019 11:58</span><br>
<b><span lang="HE" dir="RTL">אל</span><span dir="LTR"></span><span dir="LTR"></span><span dir="LTR"></span><span dir="LTR"></span>:</b>
<span lang="HE" dir="RTL">אילן מור</span><br>
<b><span lang="HE" dir="RTL">עותק</span><span dir="LTR"></span><span dir="LTR"></span><span dir="LTR"></span><span dir="LTR"></span>:</b> <a href="mailto:fast-neutrons@neutronsources.org" target="_blank" rel="noreferrer">fast-neutrons@neutronsources.org</a><br>
<b><span lang="HE" dir="RTL">נושא</span><span dir="LTR"></span><span dir="LTR"></span><span dir="LTR"></span><span dir="LTR"></span>:</b> Fibre scintillators for fast neutron imaging<u></u><u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Ilan, Thank you for bringing your <a href="https://www.sciencedirect.com/science/article/pii/S0168900211005390" target="_blank" rel="noreferrer">
nice paper</a> to our attention. I was particularly interested in two points you made about fast neutron scintillators:<u></u><u></u></p>
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<p class="MsoNormal">1) With a large aperture lens (f/0.95) the small depth of field gives better resolution than might be expected from thick (10mm) slab scintillators because you focus on the surface.<u></u><u></u></p>
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<p class="MsoNormal">2) Already available 250 micron fibre scintillators can be made quite thick because the fibre coating prevents cross-talk between fibres. If only such scintillators could be made with areas big enough to cover Michael's 200 micron pixel
detector. That's already quite good resolution for hot neutrons.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Thanks, Alan <u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">On Wed, 18 Dec 2019 at 10:05, Ilan Mor <<a href="mailto:ilmor@soreq.gov.il" target="_blank" rel="noreferrer">ilmor@soreq.gov.il</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Hello all,</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">We used in the past a steel mask with line pairs which was used to quantify the CTF of our system
(see description in the attached paper).</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Unfortunately this mask was lost.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Our colleague from PTB produced a similar mask made of heavy met.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Regards,</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Ilan</span><u></u><u></u></p>
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<p class="MsoNormal"><b><span lang="HE" dir="RTL" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">מאת</span></b><span dir="LTR"></span><span dir="LTR"></span><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""><span dir="LTR"></span><span dir="LTR"></span>:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
<a href="mailto:fast-neutrons-bounces@neutronsources.org" target="_blank" rel="noreferrer">fast-neutrons-bounces@neutronsources.org</a> [mailto:<a href="mailto:fast-neutrons-bounces@neutronsources.org" target="_blank" rel="noreferrer">fast-neutrons-bounces@neutronsources.org</a>]
<b><span lang="HE" dir="RTL">בשם</span><span dir="LTR"></span><span dir="LTR"></span><span lang="HE"><span dir="LTR"></span><span dir="LTR"></span>
</span></b>Michael Taylor<br>
<b><span lang="HE" dir="RTL">נשלח</span><span dir="LTR"></span><span dir="LTR"></span><span dir="LTR"></span><span dir="LTR"></span>:</b>
<span lang="HE" dir="RTL">יום ג 17 דצמבר 2019 19:23</span><br>
<b><span lang="HE" dir="RTL">אל</span><span dir="LTR"></span><span dir="LTR"></span><span dir="LTR"></span><span dir="LTR"></span>:</b> Lehmann Eberhard (PSI); Alan Hewat<br>
<b><span lang="HE" dir="RTL">עותק</span><span dir="LTR"></span><span dir="LTR"></span><span dir="LTR"></span><span dir="LTR"></span>:</b>
<a href="mailto:fast-neutrons@neutronsources.org" target="_blank" rel="noreferrer">fast-neutrons@neutronsources.org</a><br>
<b><span lang="HE" dir="RTL">נושא</span><span dir="LTR"></span><span dir="LTR"></span><span dir="LTR"></span><span dir="LTR"></span>:</b> POSSIBLY SPOOFED: Re: [Fast-Neutrons] characterization of fast neutron setups</span><u></u><u></u></p>
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<p class="MsoNormal">______________________________________________<u></u><u></u></p>
<p class="MsoNormal"><b> Dr Alan Hewat, NeutronOptics, Grenoble, FRANCE </b><u></u><u></u></p>
<p class="MsoNormal"><Alan.Hewat@NeutronOptics.com> +33.476.98.41.68<br>
<a href="http://www.NeutronOptics.com/hewat" target="_blank" rel="noreferrer">http://www.NeutronOptics.com/hewat</a> TVA FR 79499450856<br>
______________________________________________<u></u><u></u></p>
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