Absolute polarimetry at RHIC
Precise and absolute beam polarization measurements are critical for the RHIC spin physics program. Because all experimental spin-dependent results are normalized by beam polarization, the normalization uncertainty contributes directly to final physics uncertainties. We aimed to perform the beam pol...
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| creator | Okada, H Alekseev, I Bravar, A Bunce, G Dhawan, S Eyser, K O Gill, R Haeberli, W Huang, H Jinnouchi, O Makdisi, Y Nakagawa, I Nass, A Saito, N Stephenson, E Sviridia, D Wise, T Wood, J Zelenski, A |
| description | Precise and absolute beam polarization measurements are critical for the RHIC spin physics program. Because all experimental spin-dependent results are normalized by beam polarization, the normalization uncertainty contributes directly to final physics uncertainties. We aimed to perform the beam polarization measurement to an accuracy of DeltaPbeam/Pbeam < 5%. The absolute polarimeter consists of Polarized Atomic Hydrogen Gas Jet Target and left-right pairs of silicon strip detectors and was installed in the RHIC-ring in 2004. This system features proton-proton elastic scattering in the Coulomb nuclear interference (CNI) region. Precise measurements of the analyzing power AN of this process has allowed us to achieve DeltaPbeam/Pbeam = 4.2% in 2005 for the first long spin-physics run. In this report, we describe the entire set up and performance of the system. The procedure of beam polarization measurement and analysis results from 2004-2005 are described. Physics topics of AN in the CNI region (four-momentum transfer squared 0.001 < -t < 0.032(GeV/c)2) are also discussed. We point out the current issues and expected optimum accuracy in 2006 and the future. |
| doi_str_mv | 10.1063/1.2888110 |
| format | Conference Proceeding |
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Because all experimental spin-dependent results are normalized by beam polarization, the normalization uncertainty contributes directly to final physics uncertainties. We aimed to perform the beam polarization measurement to an accuracy of DeltaPbeam/Pbeam < 5%. The absolute polarimeter consists of Polarized Atomic Hydrogen Gas Jet Target and left-right pairs of silicon strip detectors and was installed in the RHIC-ring in 2004. This system features proton-proton elastic scattering in the Coulomb nuclear interference (CNI) region. Precise measurements of the analyzing power AN of this process has allowed us to achieve DeltaPbeam/Pbeam = 4.2% in 2005 for the first long spin-physics run. In this report, we describe the entire set up and performance of the system. The procedure of beam polarization measurement and analysis results from 2004-2005 are described. Physics topics of AN in the CNI region (four-momentum transfer squared 0.001 < -t < 0.032(GeV/c)2) are also discussed. 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Because all experimental spin-dependent results are normalized by beam polarization, the normalization uncertainty contributes directly to final physics uncertainties. We aimed to perform the beam polarization measurement to an accuracy of DeltaPbeam/Pbeam < 5%. The absolute polarimeter consists of Polarized Atomic Hydrogen Gas Jet Target and left-right pairs of silicon strip detectors and was installed in the RHIC-ring in 2004. This system features proton-proton elastic scattering in the Coulomb nuclear interference (CNI) region. Precise measurements of the analyzing power AN of this process has allowed us to achieve DeltaPbeam/Pbeam = 4.2% in 2005 for the first long spin-physics run. In this report, we describe the entire set up and performance of the system. The procedure of beam polarization measurement and analysis results from 2004-2005 are described. Physics topics of AN in the CNI region (four-momentum transfer squared 0.001 < -t < 0.032(GeV/c)2) are also discussed. We point out the current issues and expected optimum accuracy in 2006 and the future.</description><subject>BROOKHAVEN RHIC</subject><subject>COLLIDING BEAMS</subject><subject>ELASTIC SCATTERING</subject><subject>ELECTROMAGNETIC RADIATION</subject><subject>FOUR MOMENTUM TRANSFER</subject><subject>GEV RANGE</subject><subject>HYDROGEN</subject><subject>INTERFERENCE</subject><subject>PHYSICS OF ELEMENTARY PARTICLES AND FIELDS</subject><subject>POLARIMETERS</subject><subject>POLARIMETRY</subject><subject>POLARIZATION</subject><subject>POLARIZATION-ASYMMETRY RATIO</subject><subject>POLARIZED BEAMS</subject><subject>PROTON-PROTON INTERACTIONS</subject><subject>PROTONS</subject><subject>SPIN</subject><issn>0094-243X</issn><issn>1551-7616</issn><isbn>9780735404991</isbn><isbn>0735404992</isbn><fulltext>true</fulltext><rsrctype>conference_proceeding</rsrctype><creationdate>2008</creationdate><recordtype>conference_proceeding</recordtype><recordid>eNotzM1LwzAYgPHgB1jnDt49DARvne-brzc5jjHdYCCIgreSpilWumY26cH_XmGensuPh7FbhCWCFo-45MYYRDhjBSqFJWnU52xuyQAJJUFaixesALCy5FJ8XLHrlL4AuCUyBbtb1Sn2Uw6LY-zd2B1CHn8WLi9et7v1DbtsXZ_C_L8z9v60eVtvy_3L82692pcRtYTStJyC8mhcQ1r42tXkfTCmbsiDpgDSOSU9cmjRcadq0XhtLaeaGkeSxIzdn74x5a5KvsvBf_o4DMHniiMoxTn-qYeTOo7xewopV4cu-dD3bghxSpVAKxUKI34BwoNMmQ</recordid><startdate>2008</startdate><enddate>2008</enddate><creator>Okada, H</creator><creator>Alekseev, I</creator><creator>Bravar, A</creator><creator>Bunce, G</creator><creator>Dhawan, S</creator><creator>Eyser, K O</creator><creator>Gill, R</creator><creator>Haeberli, W</creator><creator>Huang, H</creator><creator>Jinnouchi, O</creator><creator>Makdisi, Y</creator><creator>Nakagawa, I</creator><creator>Nass, A</creator><creator>Saito, N</creator><creator>Stephenson, E</creator><creator>Sviridia, D</creator><creator>Wise, T</creator><creator>Wood, J</creator><creator>Zelenski, A</creator><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope><scope>OTOTI</scope></search><sort><creationdate>2008</creationdate><title>Absolute polarimetry at RHIC</title><author>Okada, H ; Alekseev, I ; Bravar, A ; Bunce, G ; Dhawan, S ; Eyser, K O ; Gill, R ; Haeberli, W ; Huang, H ; Jinnouchi, O ; Makdisi, Y ; Nakagawa, I ; Nass, A ; Saito, N ; Stephenson, E ; Sviridia, D ; Wise, T ; Wood, J ; Zelenski, A</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-o1640-8f27e5c18ad763cbab7cce88bd7c067e04aa54c120f1a2a5b3dc69927b7da7473</frbrgroupid><rsrctype>conference_proceedings</rsrctype><prefilter>conference_proceedings</prefilter><language>eng</language><creationdate>2008</creationdate><topic>BROOKHAVEN RHIC</topic><topic>COLLIDING BEAMS</topic><topic>ELASTIC SCATTERING</topic><topic>ELECTROMAGNETIC RADIATION</topic><topic>FOUR MOMENTUM TRANSFER</topic><topic>GEV RANGE</topic><topic>HYDROGEN</topic><topic>INTERFERENCE</topic><topic>PHYSICS OF ELEMENTARY PARTICLES AND FIELDS</topic><topic>POLARIMETERS</topic><topic>POLARIMETRY</topic><topic>POLARIZATION</topic><topic>POLARIZATION-ASYMMETRY RATIO</topic><topic>POLARIZED BEAMS</topic><topic>PROTON-PROTON INTERACTIONS</topic><topic>PROTONS</topic><topic>SPIN</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Okada, H</creatorcontrib><creatorcontrib>Alekseev, I</creatorcontrib><creatorcontrib>Bravar, A</creatorcontrib><creatorcontrib>Bunce, G</creatorcontrib><creatorcontrib>Dhawan, S</creatorcontrib><creatorcontrib>Eyser, K O</creatorcontrib><creatorcontrib>Gill, R</creatorcontrib><creatorcontrib>Haeberli, W</creatorcontrib><creatorcontrib>Huang, H</creatorcontrib><creatorcontrib>Jinnouchi, O</creatorcontrib><creatorcontrib>Makdisi, Y</creatorcontrib><creatorcontrib>Nakagawa, I</creatorcontrib><creatorcontrib>Nass, A</creatorcontrib><creatorcontrib>Saito, N</creatorcontrib><creatorcontrib>Stephenson, E</creatorcontrib><creatorcontrib>Sviridia, D</creatorcontrib><creatorcontrib>Wise, T</creatorcontrib><creatorcontrib>Wood, J</creatorcontrib><creatorcontrib>Zelenski, A</creatorcontrib><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Okada, H</au><au>Alekseev, I</au><au>Bravar, A</au><au>Bunce, G</au><au>Dhawan, S</au><au>Eyser, K O</au><au>Gill, R</au><au>Haeberli, W</au><au>Huang, H</au><au>Jinnouchi, O</au><au>Makdisi, Y</au><au>Nakagawa, I</au><au>Nass, A</au><au>Saito, N</au><au>Stephenson, E</au><au>Sviridia, D</au><au>Wise, T</au><au>Wood, J</au><au>Zelenski, A</au><format>book</format><genre>proceeding</genre><ristype>CONF</ristype><atitle>Absolute polarimetry at RHIC</atitle><btitle>AIP conference proceedings</btitle><date>2008</date><risdate>2008</risdate><volume>980</volume><issue>1</issue><spage>370</spage><epage>379</epage><pages>370-379</pages><issn>0094-243X</issn><eissn>1551-7616</eissn><isbn>9780735404991</isbn><isbn>0735404992</isbn><abstract>Precise and absolute beam polarization measurements are critical for the RHIC spin physics program. Because all experimental spin-dependent results are normalized by beam polarization, the normalization uncertainty contributes directly to final physics uncertainties. We aimed to perform the beam polarization measurement to an accuracy of DeltaPbeam/Pbeam < 5%. The absolute polarimeter consists of Polarized Atomic Hydrogen Gas Jet Target and left-right pairs of silicon strip detectors and was installed in the RHIC-ring in 2004. This system features proton-proton elastic scattering in the Coulomb nuclear interference (CNI) region. Precise measurements of the analyzing power AN of this process has allowed us to achieve DeltaPbeam/Pbeam = 4.2% in 2005 for the first long spin-physics run. In this report, we describe the entire set up and performance of the system. The procedure of beam polarization measurement and analysis results from 2004-2005 are described. Physics topics of AN in the CNI region (four-momentum transfer squared 0.001 < -t < 0.032(GeV/c)2) are also discussed. We point out the current issues and expected optimum accuracy in 2006 and the future.</abstract><cop>United States</cop><doi>10.1063/1.2888110</doi><tpages>10</tpages><oa>free_for_read</oa></addata></record> |
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| source | American Institute of Physics (AIP) Journals |
| subjects | BROOKHAVEN RHIC COLLIDING BEAMS ELASTIC SCATTERING ELECTROMAGNETIC RADIATION FOUR MOMENTUM TRANSFER GEV RANGE HYDROGEN INTERFERENCE PHYSICS OF ELEMENTARY PARTICLES AND FIELDS POLARIMETERS POLARIMETRY POLARIZATION POLARIZATION-ASYMMETRY RATIO POLARIZED BEAMS PROTON-PROTON INTERACTIONS PROTONS SPIN |
| title | Absolute polarimetry at RHIC |
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