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Construction of 6-gap HPL RPCs and The Test Plan

This presentation discusses the motivation behind the construction of 6-gap HPL RPCs, the structure and construction process, and future test plans including efficiency, current, noise rate, and aging tests.

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Construction of 6-gap HPL RPCs and The Test Plan

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  1. Construction of 6-gap HPL RPCs and The Test Plan • Motivation • Construction of 6-gap RPC • Future test plans Moon Bongsun – Korea Univ. 2009 Korea CMS meeting

  2. Motivation - Higher rate capability > 5 kHz/cm2 - Aiming for future muon triggers at RE1/1 for CMS - SLHC requires faster trigger with higher background 2009 Korea CMS meeting

  3. Structure of 6-Gap RPCs Ground Resistive Plate Gas gap Resistive Plate Pickup strips Single gap RPC Double gap RPC 2 mm gap RPC Double Gap RPC in CMS (left top picture). We designed new RPC which Has multiple gas layers. (right bottom) 2009 Korea CMS meeting

  4. Constructon of 6-gap RPCs Top view of inner structure of RPC 2009 Korea CMS meeting

  5. Picture of 0.6mm thick RPC under constructing. 350mm x 210mm HPL with graphite & PET coating Attatched HPLs are not parralal to Each other. HPL with attatched spacers 2009 Korea CMS meeting

  6. Change of HPL thickness 0.6mm to 1.0mm Ultimatum figure of assembled RPC gaps With strip pannel. And connected withhigh valtage 9.2kV.Measued dark currents are A~38μA at non oiled chaber 9μA at oiled chamber. Assembled RPC chamber with 1.0mm HPL. 2009 Korea CMS meeting

  7. Future Test Plans • Measuring efficiency, current, noise rate, fast charge <q> • Researching Rate capabilitay • Aging test 2009 Korea CMS meeting

  8. Experimental setup & Plastic scintillator trigger Muon event trigger method Using plastic scintillators Electronics setup for efficiency and charge distribution 2009 Koargerea CMS meeting

  9. TDC timing calibraton Single hit TDC LeCroy 2228 12 channel Caen discriminator CAEN Linear Amplifier 2009 Korea CMS meeting

  10. ADC charge calibration 2009 Korea CMS meeting

  11. Conclusion • CMS need high rate capability detector in high η-region. • Wehave assembled 6-gap RPCs with oiled and nonoiled for it. • We will work out lots of experimental test of new designed RPC. 2009 Korea CMS meeting

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