Chamber production at CERN 904 RPC UPGRADENEW meeting

Chamber production at CERN 904 RPC UPGRADE_NEW meeting, 16. July. 2013 Dong. Hyun Kim on behalf of the CERN 904 team Department of Physics, Sungkyunkwan University, Korea Outline • Status of CHAMBER • Status of RE 4/2 NEW Gap - Leak Test • Status of Mechanical preparation

Status of CHAMBER • 7’s RE 4/2 CHAMBER were Built & Cosmic Testing • 3’s RE 4/2 Chamber were replaced by tripolar(Among 7’s RE 4/2) • 10’s Gap is testing for a Dark current 3/12/2021 2

0. 00 E+00 RE 42_BO 22_15 mbar RE 42_BO 23_15 mbar RE 42_BO 24_15 mbar RE 42_BO 25_15 mbar RE 42_BO 26_15 mbar RE 42_BO 27_15 mbar RE 42_BO 28_15 mbar RE 42_BO 30_15 mbar RE 42_BO 31_15 mbar RE 42_BO 32_15 mbar RE 42_BO 33_15 mbar RE 42_BO 34_15 mbar RE 42_BO 35_15 mbar RE 42_BO 36_15 mbar RE 42_BO 37_15 mbar RE 42_BO 38_15 mbar RE 42_TN 024_15 mbar RE 42_TN 025_15 mbar RE 42_TN 026_15 mbar RE 42_TN 027_15 mbar RE 42_TN 028_15 mbar RE 42_TN 029_15 mbar RE 42_TN 030_15 mbar RE 42_TN 031_15 mbar RE 42_TN 033_15 mbar RE 42_TN 034_15 mbar RE 42_TN 035_15 mbar RE 42_TN 036_15 mbar RE 42_TN 037_15 mbar RE 42_TN 038_15 mbar RE 42_TN 039_15 mbar RE 42_TN 040_15 mbar RE 42_TW 024_15 mbar RE 42_TW 025_15 mbar RE 42_TW 026_15 mbar RE 42_TW 027_15 mbar RE 42_TW 028_15 mbar RE 42_TW 029_15 mbar RE 42_TW 030_15 mbar RE 42_TW 031_15 mbar RE 42_TW 032_15 mbar RE 42_TW 033_15 mbar RE 42_TW 034_15 mbar RE 42_TW 035_15 mbar RE 42_TW 036_15 mbar RE 42_TW 037_15 mbar RE 42_TW 038_15 mbar RE 42_TW 039_15 mbar Status of RE 4/2 New Gap Leak Test Result ( mbar/10 min ) - Y axis : Leak value/ X axis : Gap name 4. 00 E-01 3. 50 E-01 3. 00 E-01 2. 50 E-01 2. 00 E-01 1. 50 E-01 1. 00 E-01 5. 00 E-02 3/12/2021 3

Status of Mechanical Preparation • RE 4/2 Chamber – Total 20 ( without Cooling & Electronics ) • RE 4/3 Chamber – Total 25 ( without Cooling & Electronics ) • RE 4/2 Chamber – Total 6 ( with Cooling & Electronics ) • RE 4/3 Chamber – Total 1 ( with Cooling & Electronics ) 3/12/2021 4

PLAN • Dark current Test for a Gap • Build a New RE 4/2 Chambers • Leak Test for a New Chambers 3/12/2021 5