ATLAS ITk Baby-DEMO update Claudio Bortolin (EP-ADO-PO) Piotr Dziurdzia (EP-ADO-PO) Dina Giakoumi (EP-DT-FS) Bart Verlaat (EP-DT-FS) Lukasz Zwalinski (EP-DT-FS) ATLAS cooling team – 2016

BD1 status Document concerning Baby Demo chiller requirements- done P&ID of BD chiller- done Components for chiller has been selected according to P&ID Offer for BD chiller from CUT – received and launched P&ID of CO2 side – done Calculation for pipe sizes of CO2 side and components selection according to P&ID – to be done BD1 chiller order almost sent out (final discussion for the purchase taking place) BD1 CMS contribution confirmed, pump quotation received. Discussion on pump requirements with LEWA on going. BD1 accumulator offer received and thanks to the contribution of Grenoble the order has been sent out

P&ID of Baby DEMO plant

BD SR1 cooling test set-up

BD2 Infrastructure and services Basement routing defined, compressed air dew point measurement still to be done. Electrical Cabinet PP2 box with PT & TT Sensors Cooling Station PP1 box with PT & TT Sensors Foam box with detector measurements Waiting for an offer from HSE for the integration of a CO2 sensor into the gas detection system of the building. PP2 box with PT & TT Sensors

Tank volume calculation The tank volume has been calculated taking in account the operative conditions: max and min T and maximum pressure, vapour quality and the max and min tank filling mass allowed. The inlet parameters are mainly the transfer lines dimensions, so the required volume to fill the lines and the ratio (Ral) of the tank volume obtained is about 2.35 times the transfer lines volume which means a total amount of 43kg of CO2.

Risk assessment matrix No Incident Where Likelihood Severity Result Actions Results after actions suggested 1 CO2 Over pressure Plant Very Low [1] Minimal [A] A1 No actions required 2 Transfer line Basement Very low High [D] D1 Actions required to reduce the risks CO2 signals + CO2 sensor connected to an acoustic alarm of CO2 release+ Ventilation system to suck CO2 from the floor of the basement. 3 Leak Medium [3] A3 CO2 signals close to the station area 4 Medium [3] D3 Unacceptable risk: Immediate actions required to reduce the risks

Piping integration in UX15 Proposals for the locations for the PP2 manifold and the transfer lines routing into the Barrel region based on on-site investigation that took place last June: done Raphael Vuillermet confirmed that an engineer arriving at CERN in Dec 2016 will work on the CATIA models for the piping integration of the ITk cooling.

Status Next steps Rigid line 18480 mm DAQ hardware completed DAQ software development ongoing Flex lines design done Flex lines parts offers received Status Rigid line 18480 mm Flex line 9550 mm Flex lines parts order to be placed Rigid lines diameters definition Rigid line material procurement Piping and insulation installation Sensors installation Next steps Flex line 13740 mm Rigid line 16700 mm Flex line 6530 mm Manpower required for the installation in b. 18,. I. Ilyashenko of S. Petersburg interested

Flex lines design status Designer: Sven Vogt (MPI)

Flex lines Costs (all offers received):

Flex lines MLI insulation Assembly of a prototype will start soon MLI (10 layers) samples sent by RUAG (Austria) delivered to CERN to test the installation procedure: 1x Coolcat 2 NW stripe 0.2 x 2m laser cut 1x Coolcat 2 NW stripe 0.2 x 2m laser cut with additional ultrasonic spot welds (about every 300mm) in longitudinal direction on both sides with 25 to 30mm distance to the laser cut edges 1x Coolcat 2 NW stripe 0.2 x 2m laser cut with 5mm laser cut slits in longitudinal direction that hold the single layers together. 3 m of flex pipe sample being shipped by Witzenmann (Germany)

PP1 box design: 1 line with warm nosing Warm nose loop Vapor return Liquid feed Dry-air volume Detector volume If the detector boundary becomes the dry-air boundary than warm nosing is not possible! Well accessible standard VCR type connectors + Electrical breaks IDEP Slide taken from presentation of B. Verlaat (ITk cooling meeting 15.03.2016) Status from Cecilia Rossi (Genova): Warm nose heat exchanger dimensioning calculations done, design of the HX and splitter box being started

BD2 conclusions Barrel mockup moved to the final position in b. 180 and ready to be equipped with the piping. CO2 volume and pipes length defined. DAQ hardware procurement done and software development ongoing. Safety matrix and risks reduction approved by HSE. CO2 sensor integration in the gas detection system is a possible solution, waiting for an offer from N. Broca (HSE). Agreed with the project office of ATLAS to allocate manpower for the fluid distribution integration in UX15 (3D modeling). Designer available from January 2016. Sven V. (MPI) completed the design of the flex lines. Witzenmann is ready to produce and assembly the whole set of flex lines, ready to place the orders of the components. Insulation installation procedure to be tested soon. Design of the HX and splitter box being started in Genova (Cecilia). Manpower required for the installation in b. 180. I. Ilyashenko and S. Petersburg showed their interest on this project. Next ITk cooling meeting taking place on 26th October: https://indico.cern.ch/event/573943/