Tertiary Vacuum Control 8 x 50 pins Electrical Vacuum feed through connectors VTCS sensor and actuator overview per VELO half Tx_FL001 Tertiary vacuum (036) (048) (047) Tx_BD003 4x Mounting Board (Capacity = 20x PT100 & 2x Heater (2A) per board (034) Tx_PT002 (033) Tx_PT004 Tertiary Vacuum Control (035) Local Control Box Tx_PT003 Heater group Tx_HT001 Heater group Tx_HT003 Tx_VL02 Tx_VL009 _ + (046) _ + (037) (039) Tx_PT001 CO2 in and outlet Tertiary vacuum connection to secondary vacuum (041) (42) _ + _ + (038) (040) Electrical Connector Type: 6 pin LEMO (FGG.OB.306.CLAD52) Heater group Tx_HT002 Heater group Tx_HT004 (004) (001) (018) (015) (032) (029) Electrical Bulkhead Connector Type: 6 pin LEMO (EEG.OB.306.CLL) (02) (016) (030) (01) = Tx_TT01 (02) = Tx_TT02 …… (48) = Tx_TT48 Temperature sensor labeling: (007) (008) (009) (010) (011) (012) (013) (014) (017) (019) (020) (021) (022) (023) (024) (025) (026) (027) (028) (031) (003) (005) (006) TL_HX001 TL_HX002 TL_HX003 TL_HX004 TL_HX005 TL_HX006 TL_HX007 TL_HX008 TL_HX009 TL_HX010 TL_HX011 TL_HX012 TL_HX013 TL_HX014 TL_HX015 TL_HX016 TL_HX017 TL_HX018 TL_HX19 TL_HX021 TL_HX23 TL_HX024 TL_HX025 TL_HX026 TL_HX027 TL_HX20 TL_HX22 (043) (044) bverlaat@nikhef.nl Tx = TL for left detector half and TR for right detector half

VELO Thermal Control System (VTCS) Tertiary System Layout at VELO VTCS Left Local Control Box Test_Connection Tertiary vacuum Secondary vacuum TL_VL006 TL_VL003 Vapor mixture return S.15 Insulated concentric tube TL_BD001 TL_PT001 TL_VL002 TL_PT002 TL_FL002 Liquid in S.06 (046) S.08 (047) S.09.28 Left S.05 S.07 TL_BD002 TL_VL001 TL_FL001 TL_VL004 S.10.01 S.10.27 TL_HX105 TL_HX028 TL_VL007 S.13 (048) S.12.28 S.14 TL_VL008 TL_BD003 TL_PT003 (001) = Tx_TT001 (002) = Tx_TT002 …… (048) = Tx_TT048 (xxx) = Internal rod sensor Temperature sensor labeling: S.11.01 S.11.27 TL_VL009 TL_PT004 Primary vacuum Shielding wall Secondary Vacuum TL_BD004 TLR_VL001 Left Tertiary vacuum control TL_HX001 TL_HX027 TLR_VL002 Right Tertiary vacuum control S.01 = Tx_S.01 S.16.01 = Tx_S.16.01 SB_S.0 labeling: TR_HX001 TR_HX027 TR_VL009 TR_PT004 Secondary Vacuum 50 meter TR_BD004 S.11.01 S.11.27 TR_BD003 TR_PT003 Vapor mixture return TR_VL007 S.14 S.13 (048) S.15 TR_HX028 TR_VL008 TR_BD001 TR_PT001 TR_PT002 TR_BD002 S.12.28 S.10.01 Right S.10.27 Liquid in S.06 (046) (047) S.09.28 S.05 TR_VL001 S.07 TR_FL001 S.08 TR_VL004 TR_VL002 TR_FL002 TR_HX105 Insulated concentric tube VTCS Right Local Control Box TR_VL006 TR_VL003 VELO Detector Test_Connection bverlaat@nikhef.nl Tx = TL for left detector half, TR for right detector half, TLR for combined hardware

Tertiary VTCS schematics at RB84 plant (101) = Tx_TT101 (102) = Tx_TT102 …… (125) = Tx_TT125 (xxx) = Internal rod sensor Temperature sensor labeling: Tertiary VTCS schematics at RB84 plant S.01 = Tx_S.01 S.16.01 = Tx_S.16.01 Section labeling: Vapor mixture from concentric tube Liquid to concentric tube Liquid to concentric tube Vapor mixture from concentric tube TL_LT101 TL_FL101 S.05 S.05 TR_FL101 TR_LT101 TL_BD103 TL_PT102 TR_PT102 TR_BD103 (101) S.15 TL_VL113 TR_VL113 (101) S.15 TL_VL101 (120) (120) TR_VL101 (109) (109) S.21 TL_BD101 S.16 TR_BD101 S.21 TL_BD107 TLR_VL111 S.16 TR_BD107 SA_HX107 / TL_HX103 S.04 S.04 SA_HX108 / TR_HX103 TL_VL112 TR_VL112 (108) TLR_VL110 (108) SB_HX107 / TL_HX104 TL_VL102 TL_VL111 TL_HT103 TL_HT103 TR_VL111 TR_VL102 SB_HX108 / TR_HX104 TL_AC101 (123) (123) TR_AC101 (125) S.17 S.17 TL_PT104 (125) TL_HT105 S.03 TLR_VL109 S.03 TR_PT104 TR_HT105 TL_PT101 TR_PT101 TL_BD102 TL_BD106 TR_BD106 TR_BD102 (107) TL_VL109 TR_VL109 S.12.29 TL_HT104 S.09.29 S.09.29 TR_HT104 (118) (116) S.02 (116) S.12.29 (107) (103) (124) (117) S.02 (117) (124) (118) (104) TL_VL110 TL_FL102 TLR_VL115 TR_FL102 TR_VL110 (103) (104) TLR_S.01 TL_VL108 TR_VL108 Tambient SB_HX103 / TL_HX102 TLR_VL107 TR_VL115 TL_VL115 (115) (102) (119) TL_S.01 (102) (119) S.20 TL_HT101 (111) TR_S.01 TR_HT101 TL_VL107 TR_VL107 (121) (115) S.20 TLR_HT102 (115) (121) SA_HX105 / TR_HX101 SA_HX103 / TL_HX101 (122) (114) (114) S.23 TL_HT102 (114) (122) TR_HT102 SB_HX105 / TR_HX102 S.18.02 (113) (122) (113) (113) S.23 (105) TL_PT103 TR_PT103 (105) (106) S.18.01 (106) TLR_PT103 S.18.01 S.18.02 S.22 TL_PM101 TL_VL103 (112) TLR_PM101 (112) TR_HX105 (112) TR_PM101 S.22 TR_VL103 TL_BD104 TL_VL114 TL_VL106 TLR_S.20 TR_VL106 TR_VL114 TR_BD104 (110) S.19 TLR_VL114 (110) TL_VL105 S.19 TL_VL104 TR_VL104 TLR_VL105 TLR_VL101 Tertiary VTCS Left Detector (TL) Tertiary VTCS Right Detector (TR) bverlaat@nikhef.nl Tx = TL for left detector half, TR for right detector half, TLR for combined hardware

Secondary VTCS main chiller (A) (101) = SA_TT101 (102) = SA_TT102 …… (122) = SA_TT122 (xxx) = Internal rod sensor Temperature sensor labeling: Secondary VTCS main chiller (A) SA_PT102 SA_FL101 SA_SG102 S.01 = SA_S.01 S.10.01 = SA_S.10.01 Section labeling: 3/8” SA_S.06 3/8” 1/2” SA_PT103 / SA_TT109 SA_S.02 12ºC SA_S.12.01 1/2” 3/8” SA_HX101 (PA_TT102) (120) SA_S.12.05 SA_SG103 (105) 6ºC SA_S.03 SA_SG105 SA_VL103/ 129 SA_HX102 SA_S.07.05 SA_VL104 3/8” (PA_TT101) (102) (114) SA_VL107 SA_HX106 (103) S.09.01 SA_VL127 3/8” S.11.01 SA_S.04 SA_VL102 (119) (108) 5/8” ½” SA_VL108 SA_HX103 / TL_HX101 3/8” 3/8” SA_S.05 SA_VL117/130 SA_VL101 SA_S.11.05 SA_VL122/131 (106) (107) (104) SA_PT105/ SA_TT116 SA_PT104 / SA_TT113 S.07.01 SA_VL106 S.08.01 SA_PT106/ SA_TT118 ½” SA_HX108/ TR_HX103 SA_VL126 ½” 1/2” 7/8” SA_AC102 SA_S.12.02 1/2” SA_PT101 SA_HX107/ TL_HX103 SA_S.10.03 SA_S.10.04 SA_SG104 1/2” SA_VL116 SA_VL121 SA_HX104 SA_S.01 (101) SA_VL115 SA_VL120 3/8” SA_VL111 SA-S.13 3/8” SA_S.09.03 SA_S.09.04 S.09.02 S.11.02 SA_S.15 (112) ½” SA_VL124/132 SA_PM101 (115) SA_S.08.03 SA_S.08.04 (117) SA_VL112 SA_HX105 / TR_HX101 SA_PT107 3/8” 3/8” SA_AC101 (122) SA_VL114 SA_VL119 (110) S.07.02 (111) SA_VL110 S.08.02 SA_VL128 7/8” 3/8” 3/8” SA_VL125/133 (121) SA_VL123 SA_S.14 SA_PT108 bverlaat@nikhef.nl Sx = SA for Water cooled chiller, SB for back-up air-cooled chiller

Secondary VTCS back-up chiller (B) (101) = Sx_TT101 (102) = Sx_TT102 …… (122) = Sx_TT122 (xxx) = Internal rod sensor Temperature sensor labeling: Secondary VTCS back-up chiller (B) SB_SG102 SB_FL101 S.01 = SB_S.01 S.10.01 = SB_S.10.01 Section labeling: 3/8” SB_S.06 SB_PM102 SB_PT102 5/8” SB_SG105 SB_HX101 SB_HX106 ½” SB_S.07 (114) (TT_PB101) SB_PT109 (119) (102 5/8” SB_S.12 5/8” 3/8” 3/8” ½” (105) ½” SB_S.11.03 SB_S.04 SB_PT103 SB_TT109 SB_PT104 SB_TT113 SB_S.11.01 SB_S.11.02 SB_VL104 SB_S.11.04 SB_VL117/130 SB_VL122/131 ½” ½” SA_VL127 ½” SB_PT105 SB_TT116 SB_PT106 SB_TT118 ½” SB_HX108/ TR_HX104 SB_VL108 SB_VL112 SB_S.01 SB_S.10.03 SB_S.10.04 5/8” SB_HX107/ TL_HX104 SB_S.05 SB_VL107 SB_S.09.01 SB_VL111 SB_S.09.02 (104) SB_VL116 SB_VL121 SB_AC102 (101) SB_VL115 SB_VL120 SB_HX103/ TL_HX102 SB_HX105/ TR_HX102 SB_S.09.03 SB_S.09.04 SB_S.15 (107) (111) SB_PM101 SB_VL124/132 (115) 3/8” 3/8” (117) 3/8” SB_S.08.01 SB_S.08.02 (121) 3/8” SB_S.08.03 SB_S.08.04 SB_S.13 SB_VL110 SB_VL125/133 SB_VL106 (122) SB_VL114 SB_VL119 3/8” 3/8” 3/8” 3/8” bverlaat@nikhef.nl SB_PT108 Sx = SA for Water cooled chiller, SB for back-up air-cooled chiller

Acronyms bverlaat@nikhef.nl Px = Primary Cooling System (6-12°C Water) PA= Primary A (6-12°C Water) PB=Primary B (Ambient air) Sx = Secondary Cooling system (R404a chiller) SA = Secondary A SB = Secondary B Tx = Tertiary Cooling System (CO2 system) TL = Tertiary Left TR = Tertiary Right AC = Accumulator PT = Pressure Transmitter BD = Burst Disc HX = Heat Exchanger HT = Heater LT = Liquid Level Transmitter TT = Temperature Transmitter FL = Filter PM = Pump/Compressor VL = Valve SG = Sight glass bverlaat@nikhef.nl