<html>
  <head>
    <meta content="text/html; charset=ISO-8859-1"
      http-equiv="Content-Type">
  </head>
  <body bgcolor="#FFFFFF" text="#000000">
    Hi Leif,<br>
    <br>
    Our new clean room at U of Minnesota sits a few hundred feet from
    the city's light rail (also an electric surface train).  We see
    almost no measurable noise from the trains on our SEM or e-beam
    litho units, but if it becomes an issue for you the Lindgren active
    cancellation system Richard suggested was an easy retrofit to our
    lab, so you could always add it later if you're getting noise.  We
    installed one for an unrelated issue (noise from the building
    elevator) and it works perfectly and requires basically no
    maintenance.<br>
    <br>
    Cheers,<br>
    <br>
    -bryan <br>
    <br>
    <div class="moz-cite-prefix">On 9/9/2014 9:20 AM, Leif Johansen
      wrote:<br>
    </div>
    <blockquote
cite="mid:879AEF5002D70747B136D02BC86A9C982F144B@ait-pex02mbx05.win.dtu.dk"
      type="cite">
      <meta http-equiv="Content-Type" content="text/html;
        charset=ISO-8859-1">
      <meta name="Generator" content="Microsoft Word 14 (filtered
        medium)">
      <!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]-->
      <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:11.0pt;
        font-family:"Calibri","sans-serif";
        mso-fareast-language:EN-US;}
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;}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
        {mso-style-priority:99;
        mso-style-link:"Balloon Text Char";
        margin:0cm;
        margin-bottom:.0001pt;
        font-size:8.0pt;
        font-family:"Tahoma","sans-serif";
        mso-fareast-language:EN-US;}
span.EmailStyle17
        {mso-style-type:personal-compose;
        font-family:"Calibri","sans-serif";
        color:windowtext;}
span.BalloonTextChar
        {mso-style-name:"Balloon Text Char";
        mso-style-priority:99;
        mso-style-link:"Balloon Text";
        font-family:"Tahoma","sans-serif";}
.MsoChpDefault
        {mso-style-type:export-only;
        font-family:"Calibri","sans-serif";
        mso-fareast-language:EN-US;}
@page WordSection1
        {size:612.0pt 792.0pt;
        margin:3.0cm 2.0cm 3.0cm 2.0cm;}
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]-->
      <div class="WordSection1">
        <p class="MsoNormal"><span lang="EN-US">Dear all network
            members, <o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US">The City of Copenhagen
            is currently in the process of scheduling the construction
            of an electrically driven tram which may run approximately
            80 feet (ca. 25 meters) past our cleanroom facility. There
            will even be a stop right outside on the road next to us –
            i.e. many accelerations and decelerations which will emit
            rather large magnetic fields.
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US">Naturally, we are
            slightly concerned about maintaining operations – especially
            of our e-beam writer and SEM equipment. Are any of the lab
            members facing similar challenges and, if so, how do you
            tackle them? Is noise cancellation a viable option with
            large transient magnetic fields? <o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US">Best regards, <o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US">Leif<o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
        <table class="MsoNormalTable"
          style="width:300.0pt;border-collapse:collapse" cellpadding="0"
          cellspacing="0" border="0" width="400">
          <tbody>
            <tr>
              <td colspan="2" style="width:300.0pt;padding:0cm 0cm 0cm
                0cm" valign="top" width="400">
                <p class="MsoNormal"><b><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:EN-GB">Leif
                      S. Johansen
                    </span></b><b><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></b></p>
              </td>
            </tr>
            <tr>
              <td colspan="2" style="width:300.0pt;padding:0cm 0cm 0cm
                0cm" valign="top" width="400">
                <p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#9B9B9B;mso-fareast-language:EN-GB">Head
                    of Operations</span><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#9B9B9B;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
              </td>
            </tr>
            <tr>
              <td colspan="2" style="width:300.0pt;padding:0cm 0cm 0cm
                0cm" valign="top" width="400">
                <p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:EN-GB">DTU
                    Danchip
                  </span><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
              </td>
            </tr>
            <tr>
              <td colspan="2"
                style="width:300.0pt;border:none;border-bottom:solid
                #AEAEAE 1.0pt;padding:0cm 0cm 0cm 0cm" valign="top"
                width="400">
                <p class="MsoNormal" style="mso-line-height-alt:0pt"><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:EN-GB"> 
                  </span><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
              </td>
            </tr>
            <tr>
              <td style="width:262.5pt;padding:6.0pt 0cm 0cm 0cm"
                valign="top" width="350">
                <p class="MsoNormal"><b><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:EN-GB">Technical
                      University of Denmark</span></b><b><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></b></p>
              </td>
              <td rowspan="7" style="width:37.5pt;padding:6.0pt 0cm 0cm
                0cm" valign="top" width="50">
                <p class="MsoNormal" style="text-align:right"
                  align="right"><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:DA"><img
                      id="Picture_x0020_1"
                      src="cid:part1.07090802.02000407@umn.edu"
                      alt="http://www.dtu.dk/images/DTU_email_logo_01.gif"
                      height="53" width="36"></span><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
              </td>
            </tr>
            <tr>
              <td style="padding:0cm 0cm 0cm 0cm">
                <p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:EN-GB">Danchip
                  </span><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
              </td>
            </tr>
            <tr>
              <td style="padding:0cm 0cm 0cm 0cm">
                <p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:EN-GB">Ørsteds
                    Plads, Byg. 347
                  </span><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
              </td>
            </tr>
            <tr>
              <td style="padding:0cm 0cm 0cm 0cm">
                <p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:EN-GB">2800 
                    Lyngby
                  </span><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
              </td>
            </tr>
            <tr>
              <td style="padding:0cm 0cm 0cm 0cm">
                <p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:EN-GB">Direct
                    +45 45255713
                  </span><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
                <p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:EN-GB">Mobile
                    +45 25348992</span><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
              </td>
            </tr>
            <tr>
              <td style="padding:0cm 0cm 0cm 0cm">
                <p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:EN-GB"><a
                      moz-do-not-send="true"
                      href="mailto:lesjo@danchip.dtu.dk"><span
                        style="color:blue">lesjo@danchip.dtu.dk</span></a>
                  </span><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
              </td>
            </tr>
            <tr>
              <td style="padding:0cm 0cm 0cm 0cm">
                <p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:EN-GB"><a
                      moz-do-not-send="true"
                      href="http://www.danchip.dtu.dk/"><span
                        style="color:blue">www.danchip.dtu.dk/</span></a>
                  </span><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
              </td>
            </tr>
          </tbody>
        </table>
        <p class="MsoNormal"><span style="mso-fareast-language:DA"><o:p> </o:p></span></p>
        <p class="MsoNormal"><o:p> </o:p></p>
      </div>
      <br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <br>
      <pre wrap="">_______________________________________________
labnetwork mailing list
<a class="moz-txt-link-abbreviated" href="mailto:labnetwork@mtl.mit.edu">labnetwork@mtl.mit.edu</a>
<a class="moz-txt-link-freetext" href="https://www-mtl.mit.edu/mailman/listinfo.cgi/labnetwork">https://www-mtl.mit.edu/mailman/listinfo.cgi/labnetwork</a>
</pre>
    </blockquote>
    <br>
    <pre class="moz-signature" cols="72">-- 
Bryan Cord
Minnesota Nano Center (MNC)
University of Minnesota
115 Union St SE, Rm 153
Minneapolis, MN 55455
612.626.3287 (work)
857.891.6820 (cell)
<a class="moz-txt-link-abbreviated" href="mailto:bcord@umn.edu">bcord@umn.edu</a>
<a class="moz-txt-link-freetext" href="http://wiki.umn.edu/EBPG">http://wiki.umn.edu/EBPG</a></pre>
  </body>
</html>