<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="Generator" content="Microsoft Word 14 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-US" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Alan,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></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.<o:p></o:p></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.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></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.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Ilan <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></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:alan.hewat@neutronoptics.com] <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> fast-neutrons@neutronsources.org<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<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div>
<p class="MsoNormal">Ilan, Thank you for bringing your <a href="https://www.sciencedirect.com/science/article/pii/S0168900211005390">
nice paper</a> to our attention. I was particularly interested in two points you made about fast neutron scintillators:<o:p></o:p></p>
</div>
<div>
<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.<o:p></o:p></p>
</div>
<div>
<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.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Thanks, Alan <o:p></o:p></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div>
<p class="MsoNormal">On Wed, 18 Dec 2019 at 10:05, Ilan Mor <<a href="mailto:ilmor@soreq.gov.il">ilmor@soreq.gov.il</a>> wrote:<o:p></o:p></p>
</div>
<blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hello all,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><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><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Unfortunately this mask was lost.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><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><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Regards,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Ilan</span><o:p></o:p></p>
<div>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><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">fast-neutrons-bounces@neutronsources.org</a> [mailto:<a href="mailto:fast-neutrons-bounces@neutronsources.org" target="_blank">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">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><o:p></o:p></p>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<div>
<div>
<div>
<div>
<p class="MsoNormal">______________________________________________<o:p></o:p></p>
<p class="MsoNormal"><b> Dr Alan Hewat, NeutronOptics, Grenoble, FRANCE </b><o:p></o:p></p>
<p class="MsoNormal"><Alan.Hewat@NeutronOptics.com> +33.476.98.41.68<br>
<a href="http://www.NeutronOptics.com/hewat" target="_blank">http://www.NeutronOptics.com/hewat</a> TVA FR 79499450856<br>
______________________________________________<o:p></o:p></p>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>