
<html>


<head>


<meta http-equiv="Content-Type" content="text/html; charset=utf-8">


</head>


<body>


<div class="" style="word-wrap:break-word">


<div class="" style="word-wrap:break-word">Dear all,


<div class=""><br class="">


</div>


<div class=""><br class="">


</div>


<div class="">A number of McStas users have expressed that the documentation for the ESS_moderator component distributed with McStas is not completely clear. To remedy this, Ken Andersen and I have (with the help of data from Troels Schönfeldt) produced the


 attached document that will hopefully help.</div>


<div class=""><br class="">


</div>


<div class="">Please note that at this point, only TDR-like and pancake moderators are described in McStas. An updated set of moderator descriptions will be released with McStas 2.2 during the spring of 2015.</div>


<div class=""><br class="">


</div>


<div class=""> </div>


<div class="">Al the best,</div>


<div class=""><br class="">


</div>


<div class="">Peter Willendrup</div>


<div class=""><br class="">


</div>


<br class="">


<br class="">


<div class=""><span class="x_x_Apple-style-span" style="border-collapse:separate; border-spacing:0px"><span class=""><span class="" style="color:rgb(0,0,0); font-family:Helvetica; font-size:12px; font-style:normal; font-variant:normal; font-weight:normal; letter-spacing:normal; line-height:normal; orphans:2; text-align:start; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px">


<table border="0" cellspacing="0" cellpadding="0" width="400px" class="" style="font-family:Arial; font-size:8pt; color:black; border-collapse:collapse; border-spacing:2px">


<tbody class="">


<tr class="">


<td width="400px" colspan="2" valign="top" class="" style="font-weight:bold; font-size:8pt; margin-bottom:0px; font-family:Arial">


Peter Kjær Willendrup</td>


</tr>


<tr class="">


<td width="400px" colspan="2" valign="top" class="" style="color:rgb(155,155,155); font-size:8pt; margin-bottom:0px; font-family:Arial">


Senior Research Engineer, Special Advisor</td>


</tr>


<tr class="">


<td width="400px" colspan="2" valign="top" class="" style="font-size:8pt; margin-bottom:0px; font-family:Arial">


</td>


</tr>


<tr class="">


<td width="400px" colspan="2" valign="top" class="" style="font-size:8pt; margin-bottom:0px; font-family:Arial; padding-bottom:5px">


DTU Physics</td>


</tr>


</tbody>


</table>


</span><span class="" style="color:rgb(0,0,0); font-family:Helvetica; font-size:12px; font-style:normal; font-variant:normal; font-weight:normal; letter-spacing:normal; line-height:normal; orphans:2; text-align:start; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px"><span class=""><span class=""><span class=""><span class="" style="color:rgb(0,0,0); font-family:Helvetica; font-size:12px; font-style:normal; font-variant:normal; font-weight:normal; letter-spacing:normal; line-height:normal; orphans:2; text-align:start; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px"><span class=""><span class=""><span class=""><br class="x_x_Apple-interchange-newline">


<span class=""></span></span></span></span></span></span></span></span></span></span></span></div>


</div>


<div class=""></div>


</div>


<div><img src="cid:4860b1d3-2a68-49c3-a04e-d5694e96d60a@win.dtu.dk"> </div>


<div style="word-wrap:break-word">


<div class=""></div>


<div class="" style="word-wrap:break-word">


<div class=""><span class="x_x_Apple-style-span" style="border-collapse:separate; border-spacing:0px"><span class=""></span><span class="x_x_Apple-style-span" style="border-collapse:separate; border-spacing:0px"><span class="x_x_Apple-style-span" style="color:rgb(0,0,0); font-family:Helvetica; font-size:12px; font-style:normal; font-variant:normal; font-weight:normal; letter-spacing:normal; line-height:normal; orphans:2; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px; border-collapse:separate; border-spacing:0px"><span class="x_x_Apple-style-span" style="border-collapse:separate; color:rgb(0,0,0); font-style:normal; font-variant:normal; font-weight:normal; letter-spacing:normal; line-height:normal; orphans:2; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px; border-spacing:0px"><span class="x_x_Apple-style-span" style="border-collapse:separate; color:rgb(0,0,0); font-style:normal; font-variant:normal; font-weight:normal; letter-spacing:normal; line-height:normal; orphans:2; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px; border-spacing:0px"><span class="x_x_Apple-style-span" style="border-collapse:separate; color:rgb(0,0,0); font-style:normal; font-variant:normal; font-weight:normal; letter-spacing:normal; line-height:normal; orphans:2; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px; border-spacing:0px"><span class="x_x_Apple-style-span" style="border-collapse:collapse; font-size:15px"><br class="x_x_Apple-interchange-newline">


<br class="">


</span></span></span></span><span class="x_x_Apple-style-span" style="border-collapse:separate; color:rgb(0,0,0); font-family:Helvetica; font-style:normal; font-variant:normal; font-weight:normal; letter-spacing:normal; line-height:normal; orphans:2; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px; border-spacing:0px"><span class="x_x_Apple-style-span" style="border-collapse:collapse; font-family:Calibri,sans-serif; font-size:15px"><span class="x_x_Apple-style-span" style="border-collapse:separate; color:rgb(0,0,0); font-family:Helvetica; font-style:normal; font-variant:normal; font-weight:normal; letter-spacing:normal; line-height:normal; orphans:2; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px; border-spacing:0px">


<table class="x_x_MsoNormalTable" border="0" cellspacing="0" cellpadding="0" width="400" style="width:300pt; border-collapse:collapse; position:static; z-index:auto">


<tbody class="">


<tr class="">


<td width="357" valign="top" class="" style="width:267.5pt; padding:0cm">


<div class="" style="margin:0cm 0cm 0.0001pt; font-size:11pt; font-family:Calibri,sans-serif">


<b class=""><span class="" style="font-size:8pt; font-family:Arial,sans-serif; color:black">Technical University of Denmark</span></b></div>


</td>


<td width="43" rowspan="8" valign="top" class="" style="width:32.5pt; padding:0cm">


<br class="">


</td>


</tr>


</tbody>


</table>


</span></span></span></span><span class="" style="color:rgb(0,0,0); font-family:Helvetica; font-size:12px; font-style:normal; font-variant:normal; font-weight:normal; letter-spacing:normal; line-height:normal; orphans:2; text-align:start; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px"><span class=""><span class=""><span class=""><span class="" style="color:rgb(0,0,0); font-family:Helvetica; font-size:12px; font-style:normal; font-variant:normal; font-weight:normal; letter-spacing:normal; line-height:normal; orphans:2; text-align:start; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px"><span class=""><span class=""><span class=""><br class="x_x_Apple-interchange-newline">


<span class=""></span></span></span></span></span></span></span></span></span></span></span></div>


</div>


<div class=""></div>


</div>


<div><img src="cid:917cdd8e-f8ad-4282-81b6-bf6e9277a7f7@win.dtu.dk"> </div>


<div style="word-wrap:break-word">


<div class=""></div>


<div class="" style="word-wrap:break-word">


<div class=""><span class="x_x_Apple-style-span" style="border-collapse:separate; border-spacing:0px"><span class=""></span><span class="x_x_Apple-style-span" style="color:rgb(0,0,0); font-family:Helvetica; font-size:12px; font-style:normal; font-variant:normal; font-weight:normal; letter-spacing:normal; line-height:normal; orphans:2; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px; border-spacing:0px; border-collapse:separate"><span class="x_x_Apple-style-span" style="border-collapse:separate; color:rgb(0,0,0); font-family:Helvetica; font-style:normal; font-variant:normal; font-weight:normal; letter-spacing:normal; line-height:normal; orphans:2; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px; border-spacing:0px"><span class="x_x_Apple-style-span" style="border-collapse:separate; color:rgb(0,0,0); font-family:Helvetica; font-style:normal; font-variant:normal; font-weight:normal; letter-spacing:normal; line-height:normal; orphans:2; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px; border-spacing:0px"><span class="x_x_Apple-style-span" style="border-collapse:separate; color:rgb(0,0,0); font-family:Helvetica; font-style:normal; font-variant:normal; font-weight:normal; letter-spacing:normal; line-height:normal; orphans:2; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px; border-spacing:0px"><span class="x_x_Apple-style-span" style="border-collapse:separate; color:rgb(0,0,0); font-family:Helvetica; font-style:normal; font-variant:normal; font-weight:normal; letter-spacing:normal; line-height:normal; orphans:2; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px; border-spacing:0px"><span class="x_x_Apple-style-span" style="border-collapse:separate; color:rgb(0,0,0); font-family:Helvetica; font-style:normal; font-variant:normal; font-weight:normal; letter-spacing:normal; line-height:normal; orphans:2; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px; border-spacing:0px"><span class="x_x_Apple-style-span" style="border-collapse:collapse; font-family:Calibri,sans-serif">


<div class=""><br class="x_x_Apple-interchange-newline">


<br class="">


</div>


</span></span></span></span></span></span></span><span class="x_x_Apple-style-span" style="color:rgb(0,0,0); font-style:normal; font-variant:normal; font-weight:normal; letter-spacing:normal; line-height:normal; orphans:2; text-align:start; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px; border-collapse:collapse; font-family:Calibri,sans-serif; font-size:15px">


<table class="x_x_MsoNormalTable" border="0" cellspacing="0" cellpadding="0" width="400" style="width:300pt; border-collapse:collapse; position:static; z-index:auto">


<tbody class="">


<tr class="">


<td width="400" colspan="2" valign="top" class="" style="width:300pt; padding:0cm 0cm 3.75pt">


<div class="" style="margin:0cm 0cm 0.0001pt; font-size:11pt; font-family:Calibri,sans-serif">


<span class="x_x_Apple-style-span" style="border-collapse:separate; color:rgb(0,0,0); font-family:Helvetica; font-style:normal; font-variant:normal; font-weight:normal; letter-spacing:normal; line-height:normal; orphans:2; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px; border-spacing:0px">


<table class="x_x_MsoNormalTable" border="0" cellspacing="0" cellpadding="0" width="400" style="width:300pt; border-collapse:collapse; position:static; z-index:auto">


<tbody class="">


<tr class="">


<td class="" style="padding:0cm">


<div class="" style="margin:0cm 0cm 0.0001pt; font-size:11pt; font-family:Calibri,sans-serif">


<span class="" style="font-size:8pt; font-family:Arial,sans-serif; color:black">Department o</span><span class="" style="font-size:8pt; font-family:Arial,sans-serif; color:rgb(31,73,125)">f</span><span class="" style="font-size:8pt; font-family:Arial,sans-serif; color:black"> Physics</span></div>


<div class="" style="margin:0cm 0cm 0.0001pt; font-size:11pt; font-family:Calibri,sans-serif">


<span class="" style="font-size:8pt; font-family:Arial,sans-serif; color:black">Fysikvej</span></div>


</td>


</tr>


<tr class="">


<td class="" style="padding:0cm">


<div class="" style="margin:0cm 0cm 0.0001pt; font-size:11pt; font-family:Calibri,sans-serif">


<span class="" style="font-size:8pt; font-family:Arial,sans-serif; color:black">Building 307</span></div>


</td>


</tr>


<tr class="">


<td class="" style="padding:0cm">


<div class="" style="margin:0cm 0cm 0.0001pt; font-size:11pt; font-family:Calibri,sans-serif">


<span class="" style="font-size:8pt; font-family:Arial,sans-serif; color:black">DK-2800 Kongens Lyngby</span></div>


</td>


</tr>


<tr class="">


<td class="" style="padding:0cm">


<div class="" style="margin:0cm 0cm 0.0001pt; font-size:11pt; font-family:Calibri,sans-serif">


<span class="" style="font-size:8pt; font-family:Arial,sans-serif; color:black">Direct +45 2125 4612</span></div>


</td>


</tr>


<tr class="">


<td class="" style="padding:0cm">


<div class="" style="margin:0cm 0cm 0.0001pt; font-size:11pt; font-family:Calibri,sans-serif">


<span class="" style="font-size:8pt; font-family:Arial,sans-serif; color:black">Mobil +45 2125 4612</span></div>


<div class="" style="margin:0cm 0cm 0.0001pt; font-size:11pt; font-family:Calibri,sans-serif">


<span class="" style="font-size:8pt; font-family:Arial,sans-serif; color:black">Fax +45 4593 2399</span></div>


</td>


</tr>


</tbody>


</table>


</span></div>


</td>


</tr>


</tbody>


</table>


</span><span class="x_x_Apple-style-span" style="color:rgb(0,0,0); font-family:Helvetica; font-size:12px; font-style:normal; font-variant:normal; font-weight:normal; letter-spacing:normal; line-height:normal; orphans:2; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px; border-spacing:0px; border-collapse:separate"><span class="x_x_Apple-style-span" style="border-collapse:separate; color:rgb(0,0,0); font-family:Helvetica; font-style:normal; font-variant:normal; font-weight:normal; letter-spacing:normal; line-height:normal; orphans:2; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px; border-spacing:0px"><span class="x_x_Apple-style-span" style="border-collapse:separate; color:rgb(0,0,0); font-family:Helvetica; font-style:normal; font-variant:normal; font-weight:normal; letter-spacing:normal; line-height:normal; orphans:2; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px; border-spacing:0px"><span class="x_x_Apple-style-span" style="border-collapse:separate; color:rgb(0,0,0); font-family:Helvetica; font-style:normal; font-variant:normal; font-weight:normal; letter-spacing:normal; line-height:normal; orphans:2; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px; border-spacing:0px"><span class="x_x_Apple-style-span" style="border-collapse:separate; color:rgb(0,0,0); font-family:Helvetica; font-style:normal; font-variant:normal; font-weight:normal; letter-spacing:normal; line-height:normal; orphans:2; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px; border-spacing:0px"><span class="x_x_Apple-style-span" style="border-collapse:collapse"><a href="mailto:pkwi@fysik.dtu.dk" class="">pkwi@fysik.dtu.dk</a></span></span></span></span></span></span>


</span></div>


<br class="">


<div class=""></div>


</div>


<div class="" style="word-wrap:break-word">


<div class=""></div>


</div>


</div>


<div class="" style="word-wrap:break-word"></div>


</body>


</html>