RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli
High Voltage and Low Voltage System Review I.N.F.N. Naples Introduction Detector description Requirements SASY and EASY prototypes tests Systems description Cables and connectors Solutions and costs Board production and test Conclusions 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

Introduction I I.N.F.N. Naples The CMS sub-detectors will be equipped with a large part of the HV and LV systems placed around the detector; in a not “easily accessible” area. The CMS and ATLAS RPC groups are investigating the possibility to have both the systems around the detector, working in a very hard conditions for the high magnetic field and high radiation environment. The LHC RPC groups, in collaboration with the CAEN, have designed and tested an HV-LV prototype (SASY 2000) able to work in an hostile area. The system is based on the idea to split in two the HV and LV systems: LOCAL: Central system (mainframes) placed in control room; REMOTE: distribution system placed around/on the detector, consisting of a crate housing the HV and LV boards. A natural evolution of the SASY2000 has been presented to CMS (May 03) by the CAEN company: EASY system. Different solutions have been analyzed by the CMS RPC group 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

Detector description I
I.N.F.N. Naples There are 3 different kind of chambers with 2 or 3 bigaps and equipped with 6 or 12 or 18 Front-End Boards RB2/3 Bigap ALV1 DLV1 ALV2 DLV2 HV1 HV2 RB3 and RB4 ALV1 DLV1 ALV2 DLV2 HV1 HV2 Bigap RB1 and RB2/2 Bigap ALV1 DLV1 ALV2 DLV2 HV1 HV2 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

Detector description II
I.N.F.N. Naples RB1/RB2in RPC chamber Front-End Bigap Distrib. board Bigap ALV1 DLV1 ALV2 DLV2 ALV Analog Voltage = 7V Absorb. (6FEBs) = 0.42 A DLV Digital Voltage = 7V Absorb. (6FEBs) = 0.9 A I2C input LV+I2C FEB out LV in Distributes analog and digital LV It supplies LV power to 3 FEB chains It supplies the I2C main line from LB and one backup line from DT. Total power/(ALV+DLV) ch.: 1.32 A * 7 V = 9.24 W Expected Power  120 W/sector  7.2 kW/Barrel 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

Barrel wheel overview I.N.F.N. Naples 1 2 3 4 5 6 7 8 Muon racks 12 11 10 9 5 CMS wheels 12 sectors balcony 12 sectors * 5 wheels = 60 sectors 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

HV-LV schema for a Barrel sector
I.N.F.N. Naples 78 FEBs = 13 ALV+13 DLV ch bi-gaps = 34 HV ch. DT chamber RB4 2+2 LV 6 FEBs / 2 bi-gaps 6 FEBs / 2 bi-gaps 4+4 HV DT chamber RB3 2+2 LV 6 FEBs / 2 bi-gaps 6 FEBs / 2 bi-gaps 4+4 HV 6+6+6 FEBs / 3 bi-gaps 6 LV 6 HV RB2 DT chamber 4 LV 6+6 FEBs / 2 bi-gaps 4 HV 4 LV 6+6 FEBs / 2 bi-gaps 4 HV RB1 DT chamber 4 LV 6+6 FEBs / 2 bi-gaps 4 HV 2 bi-gaps = 96 strips = 6 FEBs LVD channel HV channel LVA channel 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

System requirements I I.N.F.N. Naples General requirements: working in high magnetic field (up to 2 Tesla); working in an high radiation environment (5*1010 p/cm2 & 5*1011 n/cm2 & kRad); local system in control room + distributed remote systems on the detector (at least for the LV); redundancy of the control electronic devices (mP per board) input voltage from the CMS AC/DC 48V power supply; looking forward common CMS solutions in order to simplify the hardware and software development/maintenance of the systems 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

System requirements II
I.N.F.N. Naples HV requirements: 12KV/1mA Ripple < 100 mV pp at load per f < 20 MHz Programmable voltage 0-12KV Voltage step 10V Voltage precision < 10V V/I/Trip/Status control and monitoring Error/Power leds LV requirements: 7V/3A Ripple < 10 mV pp at load per f < 20 MHz Programmable voltage 0-8V Voltage step 100 mV Voltage precision 100 mV V/I/Trip/Status control and monitoring Individual ON/OFF Error/Power leds 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

System requirements III
I.N.F.N. Naples Control and monitoring system requirements: Common hardware and software (PVSS II) solution; Detailed control/monitoring of the remote channels: voltage/current and temperature protections, errors and hard-reset for communication lost. A second independent way to control them (telnet/ssh......) Design requirements: Possibility to easily increase the HV granularity; Possibility to easily fix RPC problems: disconnect high-current/sparking gap/bi-gaps; modify the HV map in order to group bi-gaps with same working point; Possibility to measure the RPC working-point in standalone. 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

HV-LV system design I.N.F.N. Naples Different HV and LV designs have been analyzed in order to reduce the total cost preserving the system requirements and the trigger functionality: 1 HV/bigap 2 LV/6FEBs; FULL OPTION 1 HV/chamber 2 LV/chamber; CHAMBER OPTION 1 HV/station 2 LV/station; STATION OPTION Then we have analized two different solutions for both the HV and LV system based on the idea to have them on the detector or in control room. HV in control room or HV on the detector LV in control room or LV on the detector 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

HV-LV schema for FULL option
I.N.F.N. Naples 26 LV channels HV channels Chambers have been designed with 2 gaps, of adjacent bi-gaps, connected to the same HV channel, in order to reduce the number of HV channels preserving the number of station available for the muon trigger 2+2 LV 6 FEBs / 2 bi-gaps 6 FEBs / 2 bi-gaps 2+2 HV 2+2 LV 6 FEBs / 2 bi-gaps 6 FEBs / 2 bi-gaps 2+2 HV 6 LV 6+6+6 FEBs / 3 bi-gaps 3 HV 4 LV 6+6 FEBs / 2 bi-gaps 2 HV 4 LV 6+6 FEBs / 2 bi-gaps 2 HV 4 LV 6+6 FEBs / 2 bi-gaps 2 HV wheel 1 2 3 4 5 TOT gaps 408 2040 HV 204 1020 FEBs 936 4680 LV 312 1560 FULL option 1 HV channel per 2-gaps 2 LV channels per 6-FEBs 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

HV-LV schema for CHAMBER option
I.N.F.N. Naples 16 LV channels HV channels 2+2 LV 6 FEBs / 2 bi-gaps 6 FEBs / 2 bi-gaps 1+1 HV 2+2 LV 6 FEBs / 2 bi-gaps 6 FEBs / 2 bi-gaps 1+1 HV 2 LV 6+6+6 FEBs / 3 bi-gaps 1 HV Reduction of 2 LV 6+6 FEBs / 2 bi-gaps 1 HV HV 1020  480 ch LV 1560  960 ch 2 LV 6+6 FEBs / 2 bi-gaps 1 HV 2 LV 6+6 FEBs / 2 bi-gaps 1 HV wheel 1 2 3 4 5 TOT gaps 408 2040 HV 96 480 FEBs 936 4680 LV 192 960 CHAMBER option 1 HV channel per chamber 2 LV channels per chamber 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

HV-LV schema for STATION option
I.N.F.N. Naples 12 LV channels HV channels 2 LV 6 FEBs / 2 bi-gaps 6 FEBs / 2 bi-gaps 1 HV 2 LV 6 FEBs / 2 bi-gaps 6 FEBs / 2 bi-gaps 1 HV 2 LV 6+6+6 FEBs / 3 bi-gaps 1 HV reduction 2 LV 6+6 FEBs / 2 bi-gaps 1 HV HV 1020  360 ch LV 1560  720 ch 2 LV 6+6 FEBs / 2 bi-gaps 1 HV 2 LV 6+6 FEBs / 2 bi-gaps 1 HV wheel 1 2 3 4 5 TOT gaps 408 2040 HV 72 360 FEBs 936 4680 LV 144 720 STATION option 1 HV channel per station 2 LV channels per station 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

Endcap Endcap layout (descoping) R2/1 R2/2 R2/3
RPC group LHCC session CERN Endcap layout (descoping) I.N.F.N. Naples Endcap Station 1 Station 2 Station 3 Total number of chambers: 432 10 degree sector R2/1 R2/2 R2/3 High eta Low eta 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

HV-LV Endcap numbers I.N.F.N. Naples Endcap Layer RE1 RE2 RE3 # chambers 72*2 72*2 72*2 Assuming 1 HV channel/chamber & 6 HV ch x board Layer RE1 RE2 RE3 TOT Boards Crate # HV ch. 72*2 72*2 72* *2 6*2 Assuming 2 LV channel/chamber & 12 LV ch x board Layer RE1 RE2 RE3 TOT Boards Crate # LV ch. 144*2 144*2 144* * *2 ? 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

SASY 2000 prototype I.N.F.N. Naples SASY 2000 prototype The HV-LV prototype 0 consists of: HV board (SA2001), 3 LV boards (SA2002) and 1 controller. It has been split in three pieces, following a “logical separation” of the system, in order to study the functionality of every single piece and component. The following tests has been performed on both the prototypes and will be repeated for the final boards: Magnetic field test up to 7 KGauss (at CERN) (results shown by CAEN at CERN in May 2002) Radiation test up to 10 LHC eq-years (at Louvain La Neuve) (results shown) Test on the RPC to study the noise condition (to be performed at the test station in Bari); High Stress Test to study the system under very hard conditions (under test in Napoli). 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

Neutron radiation test
I.N.F.N. Naples The SASY2000 HV-LV prototype has been tested twice (May-Aug 2002) at the Louvain La Neuve radiation facility. The total neutron fluence requests for 10 LHC years is about 1x1012 n/cm2 (note: in RE1/1 region) corresponding to 2 hours and 40 min with a beam at 1 mA at 70 cm SASY2000 In first session the system worked well for 30 min. corresponding to 1.8 • 1011 n/cm2 (a factor 6 higher than that expected on RB4!) We lost the communication with the prototype. CAEN reported a known loss of current gain due to irradiation on CNY17 opto-insulator used to enable the HV/LV channels. The prototype was irradiated for 80 min corresponding to 4.8*1011 n/cm2. On the second prototype (ATLAS one) the gain current loss was cured using a lower value biasing resistor. Was registered a few SE on the controller with loss of communication but the normal condition was restored after 1 s on power OFF/ON condition (it will be implemented by firmware an HOT RESET to recover the communication without interruption of remote power supply). After the irradiation the SASY2000 was tested outside, preserving its original functionality. (robustness of hardware) 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

Magnetic field test setup
I.N.F.N. Naples Magnet: MNP24-1 at CERN Bldg. 168 B: up to 10 KGauss B around CMS: .44T Test condition: 0-7 KGauss Magnetic Field: up to 5 KGauss Test condition SA2001: VOUT = 8kV, Rload=12 M SA2002: VOUT0 = 4.7 V, VOUT1 = 5.0 V, IOUT0,1 = 1.9A from 0 a 5 KGauss: loss of efficiency 2% (// B) 0% ( B) (efficiency defined as =Pload/PDC-DC converter) (75%  73%) Future improvements: transformer oriented according  B  it will work reliably up to 8 KGauss 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

High Stress Test in Naples I
I.N.F.N. Naples The High Stress Test system has been designed and developed by the group of Naples in order to make a complete test of any HV-LV power supply. It consists of a test-box controlled by a PC running LabVIEW 6.1 At present the HST system is able to make: Long term test: A cycle of measurements (voltage and current) made using different resistive charge (from 1M to 10 G) to explore the whole range of the PS. Spark test: A cycle of spark at different voltages are generated in order to test the hardware/software behavior of the PS under this critical conditions. Calibration: independent measurement of the voltage and current (PS and test-box). The Trip-time, the rump-up and rump-down are also calibrated. 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

High Stress Test description I
I.N.F.N. Naples The test-box consists of a custom rotating switch controlled by a step-to-step motor through a microcontroller (Microchip) . Each position of the switch corresponds to an electrical contact placed on a PCB and positioned on a circle at a distance of 22,5o each others. The motor needs 400 steps to make a complete turn corresponding to about 0.9o/step. 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

High Stress Test description II
I.N.F.N. Naples The micro-controller PIC 16F is used to: controls the motor through a custom board housing a “power driver” used to generate the phases needs to control the motor. drive the LCD monitor placed on the box and the manual control. drive the communication through a serial port RS232 used to connect it to a PC. control an internal ADC (10 bits) and drive a Programmable Gain Amplifier. It is used to measure the current provided by the PS at different full scale (1mA, 100 mA, 1mA). Each position of the commutator is connected to: a different resistive charge (10G, 5G, 1G, 100M, 9M, 6); one of the four spark systems (10KV, 5KV, 2KV, short); The spark system consists of two electrodes connected between the high voltage and the ground, placed at a fixed distance in order to generate sparks at a predetermined voltage. 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

Ripple measurements I.N.F.N. Naples We are studying the noise and ripple of the HV and LV boards using a scope connected to a PC equipped with LabVIEW. After a month we have not seen any unusual noise/events on both the boards. The ripple peek to peek at load (f < 1 MHz) of the 2 HV channels is < 20 mV while for the 6 LV channels it is about 200 mv ??? The problem is present also when LV is OFF but mainframe is ON (could be a bad ground connection ?) is under study. 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

Radiation & Magnetic Field
CAEN EASY project I I.N.F.N. Naples EASY + DCS OPC SERVER CAN Bus based link Ad-hoc protocol Speed and reliability No interoperability issues Can work in hostile area It seems to respect the hardware and software requirements made by CMS but we need a prototype to say YES Standalone EASY 3000 4000 Rack Mount Radiation & Magnetic Field Full integration in SY1527/SY2527 21 slots per crate 3 kW Maximum Output Power Magnetic field capability: 2 kGauss Expected rad.tol.: 5*1010 p/cm2 , 2*1011 n/cm2 ,15 kRad Per channel: Independent ON/OFF Vmon (Connector and Load), Imon Vset (Software or Hardware) Programmable Trip, Sense wires Status Signals Imax per module (Hardware) 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

CAEN EASY project II I.N.F.N. Naples boards ready to be produced (on catalog) 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

CMS common LV solution proposal
I.N.F.N. Naples In the 2002 the CMS collaboration decided to evaluated the possibility to have a common solution for the LV (and HV) system in order to minimize: costs, installation, software, spare, expertise and maintenance. The idea has been enthusiastically accepted by the sub-detector unless HCAL. CMS has contacted a lot of electronic companies asking them to propose a common LV solution for all the subsystems giving them some general requirement and all the requirement got from each sub-detector. In the last CMS Electronic week (May 2003) companies have been invited to present a LV system for all the CMS subsystem. Two companies; CAEN and WIENER presented two projects for LV (and HV) The CAEN project, called EASY, is a natural evolution of the SASY 2000 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

1 HV ch. per chamber 2 LV ch. per chamber The “final” HV & LV schema
I.N.F.N. Naples Reduction of HV 1020  480 ch LV 1560  960 ch 1 HV ch. per chamber 2 LV ch. per chamber SECTOR schema 6 FEBs / 2 bi-gaps 6+6+6 FEBs / 3 bi-gaps 1+1 HV 1 HV 2 LV 6+6 FEBs / 2 bi-gaps 12 LV channels HV channels per wheel TOT gaps 408 2040 HV 96 480 FEBs 936 4680 LV 144 720 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

HV & LV system overview I.N.F.N. Naples Control Room LV ch. 720 LV baords 60 EASY 20 HV ch. 480 HV boards 80 12 SY1527 HV-EASY HV-EASY Detector HV distributor 1 in – 2 out HV distributor 1 in – 2 out 3 4 RPC LV RPC LV 2 5 1 6 12 7 11 8 RPC LV RPC LV 10 9 HV 4-polar cable LV cable HV 10x4-polar cable panel HV panel HV 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

LV connections schema I.N.F.N. Naples 60 LV boards placed in 20 crates (1 per balcony) Power consumption: board (12 ch.)  116 W crate (3 boards.)  350 W wheel (4 crates)  1.4 KW Total  7.0 KW 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

HV: where we are I.N.F.N. Naples High Voltage (SY1527-EASY-A3012): The power supply tender has been assigned to the CAEN in the 2004; A complete prototype has been delivered in Dec 04 and has been tested in Naples using the RB3 chamber. Board Delivery will begin in Sept 05…to Feb 06. All HV cables will be assembled at the CPE. The cables for the first two sectors are ready The multi-conductors cables has been delivered at CERN and will be sent at CPE to be assembled in Sept 2005; The barrel HV distributors are in production; The HV patch panels in the 2005 ?; 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

LV: where we are I.N.F.N. Naples Low Voltage (SY1527-EASY-A3009) : The power supply tender has been assigned to the CAEN in the 2004; A complete prototype has been delivered in Dec 04 and has been tested in Naples and then modified by the CAEN to reduce the noise (see next). Delivery will begin in Sept 05…to Feb 06. All HV cables will be assembled at the CPE. Cable, connector and pins have been received. 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

LV ripple Test Napoli feb 05
Noise ripple 01/05: +/ ~ 10 mV (150 KHz) +/GND ~ 1 V (150 KHz) -/GND ~ 1 V (150 KHz) EASY CRATE - + mP GND crate GND shield LV cable Solutions proposed: +/GND  C ~ 10 mF mP GND / crate GND  C ~ 100 mF better crate GND sense reference connections new connector Same for the HV board 10 mt Result 04/05: +/ ~ 10 mV (150 KHz) +-/GND ~ 30 mV (150 KHz) Ana1+ Ana1 – Dig1 + Dig1 – Ana2+ Ana2 – Dig2 + Dig2 - RPC RB3 distrib. shield safety GND Ref. GND

Rack LV From LV power supply with floating output ALV1 AGND1 ALV DLV1 DGND1 shielded cable AGND ALV2 AGND2 DLV DLV2 DGND DGND2 shield LV distrib. board 4 pairs IRON – MAGNET safety ground AGND FEB 1 chip chip AGND FEB copper strip chip kapton Double Gap 2 AGND DGND Double Gap 1 Chamber metallic structure AGND chip chip FEB 6 HVReturn Grounding Schema Copper 2 Copper 1 chamber GND 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

Barrel/Endcap HV and LV numbers HV LV
I.N.F.N. Naples HV COST Channel SY1527 A3512 EASY distrib Barrel 480 1 80 12 30 500 K€ Endcap 432 72 472 K€ 3500 Euro LV COST Channel SY1527 A3009 EASY distrib Barrel 720 1 60 20 260 K€ Endcap 864 72 16-20 280 K€ 3200 Euro 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

Barrel/Endcap HV and LV costs
I.N.F.N. Naples Barrel Hardware Equipment Cabling TOT HV 300 K€ 140 K€ 60 K€ 500 K€ LV 230 K€ 14 K€ 16 K€ 260 K€ Endcap Hardware Equipment Cabling TOT HV 272 K€ 140 K€ 60 K€ ? 472 K€ LV 250 K€ 14 K€ 16 K€ ? 280 K€ The total cost of the HV & LV systems is 760 – 752 K€; The HV-LV barrel cost increase (80 K€) is due to the hardware cost; 10% of the total cost is due to the cable installation. 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

USC55 HV-LV barrel racks 8U EASY fan tary heat exchange HV distributor 2U 50 U 36 input ch. 48 output ch. Total: 144 output ch. 144 input ch. "full" crate schema General Information HV EASY board: 7 ch. Full EASY crate: 42 ch. EASY (6 out 7): 36 ch. HV distributor: 32 input ch. 16 output ch. Rack height tot: 56 U turbine 4 U air defl. 2 U Rack available height 50 U 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

EASY fan tary heat exchange HV distributor 2U 56U/ 56 U 36 input ch. 48 output ch. S1H02 turbine air deflector 4U 8U EASY fan tary heat exchange HV distributor 2U 36 input ch. 48 output ch. S1H03 turbine air deflector 4U 8U EASY fan tary heat exchange HV distributor 2U 36 input ch. 48 output ch. S1H04 turbine air deflector 4U 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

S1H05 4U turbine Some numbers about this configuration: 3 “full” racks with: 4 EASY crates with 6 HV boards; 24 HV boards A3512; 9 HV distributors; tot of 144 HV channels; total height 56U (full). 1 “half” rack with: 2 SY1527 mainframes; 2 EASY crates with 4 boards; 3 HV distributors; tot of 48 HV channels. SY1527 HV 8U SY1527 LV 8U EASY fan tary heat exchange 8U 24 input ch. HV distributor 2U 48 output ch. 42U/ 56 U EASY fan tary heat exchange 8U 24 input ch. TOTAL numbers 14 EASY crates; 80 HV boards A3512; 480 HV channel; 30 HV distributors; 2 SY1527 mainframes. 2U air deflector 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

RPC rack map from DB 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

HV-LV Rack composistion
4 EASY crate per rack (S1H ); 9 HV distributors; 6 HV board A3012 per EASY crate; Rack S1H06 with 2 Mainframes + 2 A3486 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

HV cable and connectors
I.N.F.N. Naples The HV cable and connectors have been chosen and approved by CERN 2 high voltage pins to supply –12 kV 1 pin for signal return insulating material Polietilene HDPE (Eraclene Polimeri Europa (57%) Masterbatch (GPO1246 Viba) (43%) Metal cover connected to external chamber aluminum frame ZAMA (UNI 3717 G-Zn A14 Cu1) Suitable to sustain up to 15 kV Cable characteristics: According CERN safety instruction IS 23 Single conductor- = 0.16 mm Conductor 20°C = 147 /Km Core- = 3 mm Screen wire-=0.2 mm (for 10 conductors) Overall diameter = 8.4 mm (for 3 conductors) Price: €/Km (for 10 Km) Price: 24 Euro/couple pieces 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

LV connector and cable I.N.F.N. Naples The LV cable and connectors are under discussion LV cable: 8 wires  outer diam. = 7.5 mm Price 1,00 Euro/m 12 wires  outer diam. = 8.5 mm Price 1,50 Euro/m LV cable connector: female 12 pins Molex Microfit-Fit 3,0 ( ) Price 3,49 Euro/5 female pins 20 AWG Molex Microfit-Fit 3,0 ( ) Price 10,37 Euro/100 LV RPC connector: male 12 pins Molex Microfit-Fit 3,0 ( ) Price 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

LV and HV CAD cable design
I.N.F.N. Naples Max LV/HV local cable lenght = 15 mt Min LV/HV local cable lenght = 6 mt Average lenght = 12 mt 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

HV & LV board test I.N.F.N. Naples Every HV and LV boards will be tested using “loading” box built in Naples. We are still discussing about the place to test them (Naples or at CERN). The test consists in a sequence of ramp-up and ramp-down followed by a 24 hours test at maximum load of every channels. Test will be done automatically using a LabView program written in Naples by David Lomidze; Board info and results will be stored in an ad-hoc mysql DB. The board will not pass the test will be sent back to the CAEN. We hope to finish our test in May 2006 and to begin the installation during the summer 2006. 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

HV & LV board test in Naples
I.N.F.N. Naples Test setup in Naples consists of: EASY crate + A3009 (LV) + ADC + A3012 (HV) and 1 AC/DC for the 48 Volts (A3484) + 1 loading box for HV and 1 for LV 48 Volts LV HV ADC loading box 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

HV & LV board test I.N.F.N. Naples 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

HV & LV database I.N.F.N. Naples 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

Conclusions I.N.F.N. Naples The HV and LV boards are now, after three interactions with CAEN, in the specification and are in production; Chamber cables are in production (first 2 sectors); Ready to produce the “long cable” (waiting for cut–length); Distributors and patch panels are almost ready (mid 2006); The systems will be installed during the summer 2006; Still working on the 48 Volts AC/DC converter; Reduced system will be test during the next year Cosmic Challenge; Let me thanks Ranieri and Loddo for all the work done on the system before and with the Naples group. 18/09/2018 RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

RPC Manufacturing Review - Pierluigi Paolucci - I.N.F.N. Napoli

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