<html><head><title></title><style type="text/css"> p { margin: 0 0 0 0; font-family: Arial, sans-serif; font-size:10pt; font-weight: normal; font-style: normal; vertical-align: baseline; color: black; text-decoration: none; } div { border-width:0px; border-style: solid; border-color: red; } body { background-color: #fff; } p img { vertical-align: middle; } p b, li b { font-weight : bold; } p i, li i { font-style : italic; } p u, li u { text-decoration : underline; } p so, li so { text-decoration : line-through; } p sub, p sub { font-size : 70%; vertical-align: sub; } p sup, p sup { font-size : 70%; vertical-align: super; } ul { padding-left : 2em; /* for mozilla list marker box */ margin-left : 0; /* for IE list marker box */ } ol { padding-left : 2em; /* for mozilla list marker box */ margin-right : -0.5em; margin-left : 0; /* for IE list marker box */ } p.Style1, li.Style1 /*Normal*/ { margin-left: 0pt; margin-right: 0pt; text-align: left; font-family: 'Arial', sans-serif;; font-size: 10pt;font-weight: normal; font-style: normal; vertical-align: baseline; } p.Style2, li.Style2 /*Heading 1*/ { margin-left: 0pt; margin-right: 0pt; text-align: left; font-family: 'Arial', sans-serif;; font-size: 13.26315789473684pt;font-weight: bold; font-style: normal; vertical-align: baseline; } p.Style3, li.Style3 /*Heading 2*/ { margin-left: 0pt; margin-right: 0pt; text-align: left; font-family: 'Arial', sans-serif;; font-size: 12pt;font-weight: bold; font-style: italic; vertical-align: baseline; } p.Style4, li.Style4 /*Heading 3*/ { margin-left: 0pt; margin-right: 0pt; text-align: left; font-family: 'Arial', sans-serif;; font-size: 12pt;font-weight: normal; font-style: normal; vertical-align: baseline; } p.Style5, li.Style5 /*Paragraph*/ { margin-left: 0pt; margin-right: 0pt; text-indent: 21pt; text-align: left; font-family: 'Arial', sans-serif;; font-size: 10pt;font-weight: normal; font-style: normal; vertical-align: baseline; } p.Style6, li.Style6 /*List*/ { margin-left: 14.25pt; margin-right: 0pt; text-indent: -14.25pt; text-align: left; font-family: 'Arial', sans-serif;; font-size: 10pt;font-weight: normal; font-style: normal; vertical-align: baseline; } p.Style7, li.Style7 /*Indent*/ { margin-left: 108pt; margin-right: 0pt; text-align: left; font-family: 'Arial', sans-serif;; font-size: 10pt;font-weight: normal; font-style: normal; vertical-align: baseline; } p.Style8, li.Style8 /*Title*/ { margin-left: 0pt; margin-right: 0pt; text-align: center; font-family: 'Times New Roman', sans-serif;; font-size: 24pt;font-weight: bold; font-style: normal; vertical-align: baseline; } p.Style9, li.Style9 /*Subtitle*/ { margin-left: 0pt; margin-right: 0pt; text-align: center; font-family: 'Times New Roman', sans-serif;; font-size: 18pt;font-weight: normal; font-style: normal; vertical-align: baseline; } </style></head><body><div id="mc-region-4" style="position: absolute; top: 11.25pt; left: 12pt; width: 431.75pt; "><a name="" /><p class="Style1"><span style="font-size: 13.26315789473684pt; font-family: 'Arial', sans-serif;"><b><span>STAR TPC wire aging considerations with measured and projected ionization load </span></b></span></p></div><div id="mc-region-394" style="position: absolute; top: 50.25pt; left: 24pt; width: 56.75pt; "><a name="" /><p class="Style1">10/3/2006</p><p class="Style1">H. Wieman </p></div><div id="mc-region-89" style="position: absolute; top: 86.25pt; left: 24pt; width: 419pt; "><a name="" /><p class="Style1">In P10 wire aging has been reported for wires that have an accumulated ionization exposure of 0.1 coul/cm. This limit however can vary by a factor of 10 either way depending on chamber details, in particular the amount of contaminants.</p><p class="Style1"></p><p class="Style1">Blair Stringfellow reports various wire currents under different conditions which can provide some guidance for life time expectations. </p></div><div id="mc-region-91" style="position: absolute; top: 164.25pt; left: 24pt; width: 420.5pt; "><a name="" /><p class="Style1">Yuri Fisyak has done careful monitoring of the gas gain for purposes of dE/dX determination which could potentially provide a measure of wire aging as one expects the gain to diminish with the build up of contaminants on the wires. His results are confusing in that there appears to be a few percent rise in gain with time on the inner more heavily dosed wires while the outer sector show an opposite trend. The apparent lack of aging, however, is consistent with Blair's estimate of total accumulated charge to date: 0.0005 coul/cm on the inner wires, a factor of 200 below the aging onset charge of 0.1 coul/cm. </p></div><div id="mc-region-93" style="position: absolute; top: 260.25pt; left: 24pt; width: 420.5pt; "><a name="" /><p class="Style1">Initially with heavy ion running Blair observed that wire currents were dominated by gating frequency, but more recently closed gate currents have been observed for pp running which is fill dependent indicating contributions from background as well as from gated interactions.</p></div><div id="mc-region-122" style="position: absolute; top: 314.25pt; left: 48pt; width: 209pt; "><a name="" /><p class="Style1">Maximum closed gate pp inner section current:</p></div><div id="mc-region-97" style="position: absolute; top: 314.25pt; left: 264pt; width: 55.25pt; "><a name="" /><p class="Style1">20 to 30 nA</p></div><div id="mc-region-121" style="position: absolute; top: 332.25pt; left: 48pt; width: 230.75pt; "><a name="" /><p class="Style1">pp wire currents with triggered gate operation: 80 nA</p></div><div id="mc-region-260" style="position: absolute; top: 359.25pt; left: 0pt; width: 293pt; "><a name="" /><p class="Style1"><span style="font-size: 13.26315789473684pt; "><b>Projecting wire life time during pp operation</b></span></p></div><div id="mc-region-140" style="position: absolute; top: 392.25pt; left: 6pt; width: 424.25pt; "><a name="" /><p class="Style1">In estimating the remaining years of operation there are two components that must be scaled. There is the wire current that exists when the gate is closed and the beam and anodes are on.</p><p class="Style1">There is also the wire current that appears when gated and this depends on the gating frequency.</p></div><div id="mc-region-294" style="position: absolute; top: 446.25pt; left: 6pt; width: 335.75pt; "><a name="" /><p class="Style1">The following current numbers are maximum values from pp running FY2006.</p></div><div id="mc-region-300" style="position: absolute; top: 477pt; left: 6pt; width: 75pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0001_24504062.PNG" id="generatedImage300" path=".\WireAgingLimits2006Estimate_images/IMG0001_24504062.PNG" style="width: 75pt;height: 12.75pt;"></img></div><div id="mc-region-338" style="position: absolute; top: 476.25pt; left: 198pt; width: 202.25pt; "><a name="" /><p class="Style1">Trigger rate while following currents measured</p></div><div id="mc-region-302" style="position: absolute; top: 500.25pt; left: 6pt; width: 103.5pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0002_24504062.PNG" id="generatedImage302" path=".\WireAgingLimits2006Estimate_images/IMG0002_24504062.PNG" style="width: 103.5pt;height: 33.75pt;"></img></div><div id="mc-region-339" style="position: absolute; top: 506.25pt; left: 198pt; width: 122pt; "><a name="" /><p class="Style1">Luminosity FY 2006 pp run</p></div><div id="mc-region-303" style="position: absolute; top: 555pt; left: 6pt; width: 108.75pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0003_24504062.PNG" id="generatedImage303" path=".\WireAgingLimits2006Estimate_images/IMG0003_24504062.PNG" style="width: 108.75pt;height: 12.75pt;"></img></div><div id="mc-region-340" style="position: absolute; top: 554.25pt; left: 198pt; width: 181.25pt; "><a name="" /><p class="Style1">Section current when gating at TrigBase</p></div><div id="mc-region-305" style="position: absolute; top: 585pt; left: 6pt; width: 72.75pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0004_24504062.PNG" id="generatedImage305" path=".\WireAgingLimits2006Estimate_images/IMG0004_24504062.PNG" style="width: 72.75pt;height: 12.75pt;"></img></div><div id="mc-region-341" style="position: absolute; top: 584.25pt; left: 198pt; width: 239.75pt; "><a name="" /><p class="Style1">Section current when gate closed. Depends on luminosity and background</p></div><div id="mc-region-307" style="position: absolute; top: 621pt; left: 6pt; width: 166.5pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0005_24504062.PNG" id="generatedImage307" path=".\WireAgingLimits2006Estimate_images/IMG0005_24504062.PNG" style="width: 166.5pt;height: 12.75pt;"></img></div><div id="mc-region-342" style="position: absolute; top: 620.25pt; left: 198pt; width: 180.5pt; "><a name="" /><p class="Style1">Section current, gate open. Depends on luminosity, background and trigger rate.</p></div><div id="mc-region-327" style="position: absolute; top: 669pt; left: 6pt; width: 62.25pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0006_24504078.PNG" id="generatedImage327" path=".\WireAgingLimits2006Estimate_images/IMG0006_24504078.PNG" style="width: 62.25pt;height: 12.75pt;"></img></div><div id="mc-region-343" style="position: absolute; top: 668.25pt; left: 198pt; width: 149pt; "><a name="" /><p class="Style1">Length of inner sector short wires</p></div><div id="mc-region-330" style="position: absolute; top: 704.25pt; left: 6pt; width: 120pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0007_24504078.PNG" id="generatedImage330" path=".\WireAgingLimits2006Estimate_images/IMG0007_24504078.PNG" style="width: 120pt;height: 27.75pt;"></img></div><div id="mc-region-344" style="position: absolute; top: 710.25pt; left: 198pt; width: 124.25pt; "><a name="" /><p class="Style1">number of wires per section</p></div><div id="mc-region-200" style="position: absolute; top: 770.25pt; left: 330pt; width: 94.25pt; "><a name="" /><p class="Style1">Charge accumulated per cm</p></div><div id="mc-region-199" style="position: absolute; top: 755.25pt; left: 6pt; width: 290.25pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0008_24504078.PNG" id="generatedImage199" path=".\WireAgingLimits2006Estimate_images/IMG0008_24504078.PNG" style="width: 290.25pt;height: 42.75pt;"></img></div><div id="mc-region-205" style="position: absolute; top: 824.25pt; left: 72pt; width: 126.5pt; "><a name="" /><p class="Style1">as a function of </p><p class="Style1">rt trigger rate</p><p class="Style1">L luminosity</p><p class="Style1">ta time anode and beam on</p><p class="Style1">tg time gating and beam on</p></div><div id="mc-region-347" style="position: absolute; top: 902.25pt; left: 6pt; width: 72pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0009_24504078.PNG" id="generatedImage347" path=".\WireAgingLimits2006Estimate_images/IMG0009_24504078.PNG" style="width: 72pt;height: 27.75pt;"></img></div><div id="mc-region-366" style="position: absolute; top: 908.25pt; left: 174pt; width: 251pt; "><a name="" /><p class="Style1">Charge limit where wire aging could start to be a concern</p></div><div id="mc-region-349" style="position: absolute; top: 939pt; left: 6pt; width: 96pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0010_24504078.PNG" id="generatedImage349" path=".\WireAgingLimits2006Estimate_images/IMG0010_24504078.PNG" style="width: 96pt;height: 12.75pt;"></img></div><div id="mc-region-365" style="position: absolute; top: 944.25pt; left: 174pt; width: 236.75pt; "><a name="" /><p class="Style1">The time that TPC is being gated during RHIC running</p></div><div id="mc-region-358" style="position: absolute; top: 975pt; left: 6pt; width: 99.75pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0011_24504078.PNG" id="generatedImage358" path=".\WireAgingLimits2006Estimate_images/IMG0011_24504078.PNG" style="width: 99.75pt;height: 12.75pt;"></img></div><div id="mc-region-364" style="position: absolute; top: 974.25pt; left: 174pt; width: 243.5pt; "><a name="" /><p class="Style1">The time that TPC anodes are on during RHIC running. </p></div><div id="mc-region-354" style="position: absolute; top: 1011pt; left: 6pt; width: 90.75pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0012_24504078.PNG" id="generatedImage354" path=".\WireAgingLimits2006Estimate_images/IMG0012_24504078.PNG" style="width: 90.75pt;height: 12.75pt;"></img></div><div id="mc-region-363" style="position: absolute; top: 1010.25pt; left: 174pt; width: 170.75pt; "><a name="" /><p class="Style1">The fraction of the year that RHIC runs</p></div><div id="mc-region-216" style="position: absolute; top: 1047pt; left: 6pt; width: 54.75pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0013_24504078.PNG" id="generatedImage216" path=".\WireAgingLimits2006Estimate_images/IMG0013_24504078.PNG" style="width: 54.75pt;height: 12.75pt;"></img></div><div id="mc-region-362" style="position: absolute; top: 1046.25pt; left: 174pt; width: 75.5pt; "><a name="" /><p class="Style1">trigger rate 2006</p></div><div id="mc-region-219" style="position: absolute; top: 1070.25pt; left: 6pt; width: 105pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0014_24504093.PNG" id="generatedImage219" path=".\WireAgingLimits2006Estimate_images/IMG0014_24504093.PNG" style="width: 105pt;height: 33.75pt;"></img></div><div id="mc-region-221" style="position: absolute; top: 1119pt; left: 6pt; width: 189pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0015_24504093.PNG" id="generatedImage221" path=".\WireAgingLimits2006Estimate_images/IMG0015_24504093.PNG" style="width: 189pt;height: 12.75pt;"></img></div><div id="mc-region-368" style="position: absolute; top: 1118.25pt; left: 240pt; width: 169.25pt; "><a name="" /><p class="Style1">time running anode with beam in 2006</p></div><div id="mc-region-361" style="position: absolute; top: 1155pt; left: 6pt; width: 186pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0016_24504093.PNG" id="generatedImage361" path=".\WireAgingLimits2006Estimate_images/IMG0016_24504093.PNG" style="width: 186pt;height: 12.75pt;"></img></div><div id="mc-region-367" style="position: absolute; top: 1154.25pt; left: 240pt; width: 164pt; "><a name="" /><p class="Style1">time running gated with bean in 2006</p></div><div id="mc-region-236" style="position: absolute; top: 1185pt; left: 6pt; width: 162.75pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0017_24504093.PNG" id="generatedImage236" path=".\WireAgingLimits2006Estimate_images/IMG0017_24504093.PNG" style="width: 162.75pt;height: 12.75pt;"></img></div><div id="mc-region-237" style="position: absolute; top: 1220.25pt; left: 6pt; width: 114pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0018_24504093.PNG" id="generatedImage237" path=".\WireAgingLimits2006Estimate_images/IMG0018_24504093.PNG" style="width: 114pt;height: 27.75pt;"></img></div><div id="mc-region-246" style="position: absolute; top: 1268.25pt; left: 6pt; width: 75pt; background-color: inherit; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0019_24504093.PNG" id="generatedImage246" path=".\WireAgingLimits2006Estimate_images/IMG0019_24504093.PNG" style="width: 75pt;height: 27.75pt;"></img></div><div id="mc-region-244" style="position: absolute; top: 1275pt; left: 108pt; width: 54pt; background-color: inherit; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0020_24504093.PNG" id="generatedImage244" path=".\WireAgingLimits2006Estimate_images/IMG0020_24504093.PNG" style="width: 54pt;height: 12.75pt;"></img></div><div id="mc-region-372" style="position: absolute; top: 1274.25pt; left: 222pt; width: 222.5pt; background-color: inherit; "><a name="" /><p class="Style1">projected number of years of pp operation at 2006 pp level</p></div><div id="mc-region-247" style="position: absolute; top: 1316.25pt; left: 6pt; width: 105pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0021_24504093.PNG" id="generatedImage247" path=".\WireAgingLimits2006Estimate_images/IMG0021_24504093.PNG" style="width: 105pt;height: 33.75pt;"></img></div><div id="mc-region-371" style="position: absolute; top: 1322.25pt; left: 222pt; width: 129.5pt; "><a name="" /><p class="Style1">expected pp luminosity 2008</p></div><div id="mc-region-251" style="position: absolute; top: 1365pt; left: 6pt; width: 58.5pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0022_24504109.PNG" id="generatedImage251" path=".\WireAgingLimits2006Estimate_images/IMG0022_24504109.PNG" style="width: 58.5pt;height: 12.75pt;"></img></div><div id="mc-region-370" style="position: absolute; top: 1364.25pt; left: 222pt; width: 78.5pt; "><a name="" /><p class="Style1">future trigger rate</p></div><div id="mc-region-248" style="position: absolute; top: 1400.25pt; left: 0pt; width: 169.5pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0023_24504109.PNG" id="generatedImage248" path=".\WireAgingLimits2006Estimate_images/IMG0023_24504109.PNG" style="width: 169.5pt;height: 27.75pt;"></img></div><div id="mc-region-369" style="position: absolute; top: 1454.25pt; left: 222pt; width: 213.5pt; background-color: inherit; "><a name="" /><p class="Style1">projected number of pp years operation with increased luminosity and increased trigger rate.</p></div><div id="mc-region-255" style="position: absolute; top: 1461pt; left: 6pt; width: 58.5pt; background-color: inherit; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0024_24504109.PNG" id="generatedImage255" path=".\WireAgingLimits2006Estimate_images/IMG0024_24504109.PNG" style="width: 58.5pt;height: 12.75pt;"></img></div><div id="mc-region-261" style="position: absolute; top: 1529.25pt; left: 12pt; width: 312.5pt; "><a name="" /><p class="Style1"><span style="font-size: 13.26315789473684pt; "><b>Projecting wire life time during AuAu operation</b></span></p></div><div id="mc-region-266" style="position: absolute; top: 1574.25pt; left: 6pt; width: 438.5pt; "><a name="" /><p class="Style1">During AuAu operation the maximum section wire currents were close to the pp operation reported above, 80 nA. It is not known whether there was a significant gate closed component to the current when operating with AuAu at this level, but it was noted earlier in 2002 that the the wire currents depended primarily on gate rate and was not luminosity dependent. This seems reasonable since with AuAu operation the luminosities are much lower than with pp. The total current is about the same but unlike pp the ionization does not come from pileup but is a result of the many tracks associated with single AuAu collisions. In projecting AuAu numbers we therefore assume that the wire current scales as gate rate.</p></div><div id="mc-region-381" style="position: absolute; top: 1701pt; left: 6pt; width: 80.25pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0025_24504109.PNG" id="generatedImage381" path=".\WireAgingLimits2006Estimate_images/IMG0025_24504109.PNG" style="width: 80.25pt;height: 12.75pt;"></img></div><div id="mc-region-377" style="position: absolute; top: 1700.25pt; left: 210pt; width: 185pt; "><a name="" /><p class="Style1">Measured section current AuAu operation</p></div><div id="mc-region-380" style="position: absolute; top: 1737pt; left: 6pt; width: 96pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0026_24504109.PNG" id="generatedImage380" path=".\WireAgingLimits2006Estimate_images/IMG0026_24504109.PNG" style="width: 96pt;height: 12.75pt;"></img></div><div id="mc-region-378" style="position: absolute; top: 1736.25pt; left: 210pt; width: 206pt; "><a name="" /><p class="Style1">Trigger rate during above current measurement</p></div><div id="mc-region-272" style="position: absolute; top: 1790.25pt; left: 294pt; width: 94.25pt; "><a name="" /><p class="Style1">Charge accumulated per cm</p></div><div id="mc-region-269" style="position: absolute; top: 1775.25pt; left: 12pt; width: 196.5pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0027_24504109.PNG" id="generatedImage269" path=".\WireAgingLimits2006Estimate_images/IMG0027_24504109.PNG" style="width: 196.5pt;height: 42.75pt;"></img></div><div id="mc-region-270" style="position: absolute; top: 1844.25pt; left: 78pt; width: 128pt; "><a name="" /><p class="Style1">as a function of </p><p class="Style1" style="margin-left: 0pt; margin-right: 0pt; text-align: left;">rt trigger rate</p><p class="Style1">tg time gating with beam on</p></div><div id="mc-region-274" style="position: absolute; top: 1934.25pt; left: 6pt; width: 159.75pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0028_24504109.PNG" id="generatedImage274" path=".\WireAgingLimits2006Estimate_images/IMG0028_24504109.PNG" style="width: 159.75pt;height: 27.75pt;"></img></div><div id="mc-region-384" style="position: absolute; top: 1940.25pt; left: 198pt; width: 215.75pt; "><a name="" /><p class="Style1">at 2004 operating conditions assuming 6 months operation of straight Au Au</p></div><div id="mc-region-389" style="position: absolute; top: 1994.25pt; left: 6pt; width: 149.25pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0029_24504109.PNG" id="generatedImage389" path=".\WireAgingLimits2006Estimate_images/IMG0029_24504109.PNG" style="width: 149.25pt;height: 27.75pt;"></img></div><div id="mc-region-390" style="position: absolute; top: 2061pt; left: 6pt; width: 82.5pt; background-color: inherit; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0030_24504125.PNG" id="generatedImage390" path=".\WireAgingLimits2006Estimate_images/IMG0030_24504125.PNG" style="width: 82.5pt;height: 12.75pt;"></img></div><div id="mc-region-383" style="position: absolute; top: 2060.25pt; left: 198pt; width: 207.5pt; background-color: inherit; "><a name="" /><p class="Style1">projected number of AuAu years operation with 2004 trigger rate rate</p></div><div id="mc-region-391" style="position: absolute; top: 2108.25pt; left: 6pt; width: 166.5pt; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0031_24504125.PNG" id="generatedImage391" path=".\WireAgingLimits2006Estimate_images/IMG0031_24504125.PNG" style="width: 166.5pt;height: 27.75pt;"></img></div><div id="mc-region-392" style="position: absolute; top: 2187pt; left: 6pt; width: 95.25pt; background-color: inherit; "><a name="" /><img border="0" src=".\WireAgingLimits2006Estimate_images/IMG0032_24504125.PNG" id="generatedImage392" path=".\WireAgingLimits2006Estimate_images/IMG0032_24504125.PNG" style="width: 95.25pt;height: 12.75pt;"></img></div><div id="mc-region-382" style="position: absolute; top: 2186.25pt; left: 198pt; width: 200.75pt; background-color: inherit; "><a name="" /><p class="Style1">projected number of AuAu years operation with 1 kHz trigger rate</p></div><div></div></body></html>