The WArP Experiment: A Double-Phase Argon Detector for Dark Matter Searches

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td align="left">   Nuclide </td><td align="center"><svg height="12.175" id="M158" style="vertical-align:-2.34499pt" version="1.1" viewbox="0 0 8.6374998 12.175" width="8.6374998" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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t0.5 -143.5h2q155 193 155 297q0 26 -12 47q-5 8 -5 15q0 16 12.5 27t29.5 11q21 0 34 -21t13 -55z" id="x1D6FE"></path></g>
</svg>-Energy (keV) </td><td align="center"> LY (phe/keV) </td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td align="left"><svg height="15.9125" id="M159" style="vertical-align:-0.0pt" version="1.1" viewbox="0 0 17.8375 15.9125" width="17.8375" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.012,-0,0,-.012,5.725,7.688)"><path d="M137 343l67 33q37 17 63 17q79 0 129.5 -53t50.5 -131q0 -92 -58 -156.5t-147 -64.5t-147 68t-58 182q0 63 17 119t43 95.5t61.5 72t69 52t67.5 31.5q62 22 128 33l6 -32q-56 -11 -108 -35q-149 -71 -184 -231zM227 337q-47 0 -95 -27q-6 -23 -6 -70q0 -93 36 -155.5
t96 -62.5q53 0 78 45.5t25 105.5q0 68 -35 116t-99 48z" id="x36"></path></g><g transform="matrix(.012,-0,0,-.012,11.436,7.688)"><path d="M241 635q53 0 94 -28.5t63.5 -76t33.5 -102.5t11 -116q0 -58 -11 -112.5t-34 -103.5t-63.5 -78.5t-94.5 -29.5t-95 28t-64.5 75t-34.5 102.5t-11 118.5q0 58 11.5 112.5t34.5 103t64.5 78t95.5 29.5zM238 602q-32 0 -55.5 -25t-35.5 -68t-17.5 -91t-5.5 -105
q0 -76 10 -138.5t37 -107.5t69 -45q32 0 55.5 25t35.5 68.5t17.5 91.5t5.5 105t-5.5 105.5t-18 92t-36 68t-56.5 24.5z" id="x30"></path></g>
</svg>Co </td><td align="center"> 1173 </td><td align="center"><span style="width: 74.362503px;"><svg height="11.2875" id="M160" style="vertical-align:-1.09097pt" version="1.1" viewbox="0 0 74.362503 11.2875" width="74.362503" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,10.862)"><path d="M384 0h-275v27q67 5 81.5 18.5t14.5 68.5v385q0 38 -7.5 47.5t-40.5 10.5l-48 2v24q85 15 178 52v-521q0 -55 14.5 -68.5t82.5 -18.5v-27z" id="x31"></path></g><g transform="matrix(.017,-0,0,-.017,8.222,10.862)"><path d="M113 -12q-24 0 -39.5 16t-15.5 42q0 24 16 40.5t40 16.5t40 -16.5t16 -40.5q0 -26 -16 -42t-41 -16z" id="x2E"></path></g><g transform="matrix(.017,-0,0,-.017,12.098,10.862)"><path d="M153 550l-26 -186q79 31 111 31q90 0 141.5 -51t51.5 -119q0 -93 -89 -166q-85 -69 -173 -71q-32 0 -61.5 11.5t-41.5 23.5q-18 17 -17 34q2 16 22 33q14 9 26 -1q61 -50 124 -50q60 0 93 43.5t33 104.5q0 69 -41.5 110t-121.5 41q-53 0 -102 -20l38 305h286l6 -8
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<g transform="matrix(.012,-0,0,-.012,5.725,7.688)"><path d="M137 343l67 33q37 17 63 17q79 0 129.5 -53t50.5 -131q0 -92 -58 -156.5t-147 -64.5t-147 68t-58 182q0 63 17 119t43 95.5t61.5 72t69 52t67.5 31.5q62 22 128 33l6 -32q-56 -11 -108 -35q-149 -71 -184 -231zM227 337q-47 0 -95 -27q-6 -23 -6 -70q0 -93 36 -155.5
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</svg>Co </td><td align="center"> 1335 </td><td align="center"><span style="width: 74.362503px;"><svg height="11.4" id="M162" style="vertical-align:-1.09097pt" version="1.1" viewbox="0 0 74.362503 11.4" width="74.362503" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,10.963)"><path d="M384 0h-275v27q67 5 81.5 18.5t14.5 68.5v385q0 38 -7.5 47.5t-40.5 10.5l-48 2v24q85 15 178 52v-521q0 -55 14.5 -68.5t82.5 -18.5v-27z" id="x31"></path></g><g transform="matrix(.017,-0,0,-.017,8.222,10.963)"><path d="M113 -12q-24 0 -39.5 16t-15.5 42q0 24 16 40.5t40 16.5t40 -16.5t16 -40.5q0 -26 -16 -42t-41 -16z" id="x2E"></path></g><g transform="matrix(.017,-0,0,-.017,12.098,10.963)"><path d="M153 550l-26 -186q79 31 111 31q90 0 141.5 -51t51.5 -119q0 -93 -89 -166q-85 -69 -173 -71q-32 0 -61.5 11.5t-41.5 23.5q-18 17 -17 34q2 16 22 33q14 9 26 -1q61 -50 124 -50q60 0 93 43.5t33 104.5q0 69 -41.5 110t-121.5 41q-53 0 -102 -20l38 305h286l6 -8
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</svg>Ba </td><td align="center"> 356 </td><td align="center"><span style="width: 74.362503px;"><svg height="11.2875" id="M164" style="vertical-align:-1.09097pt" version="1.1" viewbox="0 0 74.362503 11.2875" width="74.362503" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</svg>Cs </td><td align="center"> 662 </td><td align="center"><span style="width: 74.362503px;"><svg height="11.2875" id="M166" style="vertical-align:-1.09097pt" version="1.1" viewbox="0 0 74.362503 11.2875" width="74.362503" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</svg></span></td></tr><tr><td align="center" colspan="3"><hr/></td></tr><tr><td align="left">  Bkg </td><td align="center"> Endpoint (keV) </td><td align="center"> LY (phe/keV) </td></tr><tr><td align="center" colspan="3"><hr/></td></tr><tr><td align="left"><svg height="15.8375" id="M167" style="vertical-align:-0.0pt" version="1.1" viewbox="0 0 17.8375 15.8375" width="17.8375" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</svg>Ar </td><td align="center"> 565 </td><td align="center"><span style="width: 28.475px;"><svg height="11.125" id="M168" style="vertical-align:-0.17555pt" version="1.1" viewbox="0 0 28.475 11.125" width="28.475" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</svg></span></td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Summary of light yield measurements from calibration lines (gamma sources) and background measurements, performed in November 2011. Errors from fits are negligible. Errors on LY for <svg height="12.175" id="M157" style="vertical-align:-2.34499pt" version="1.1" viewbox="0 0 8.6374998 12.175" width="8.6374998" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</svg>-sources are taken as the sigma of the photo-peak distribution.

Advances in High Energy Physics

tab2

Table 2

Table 2: The WArP Experiment: A Double-Phase Argon Detector for Dark Matter Searches 