The iALMA Cryofacility consist of a 2x1 meter Cryofacility that will permit to test the ALMA band 2+3 cartridge at operational conditions. The Cryofacility will be setup at INAF/IASF-Bologna

TERENZI, LUCA

VILLA, Fabrizio

OA@INAF - Istituto Nazionale di Astrofisica

2014Publication Year2023-02-15T16:08:43ZAcceptance in OA@INAFiALMA Cryofacility dry-run specificationsTitleVILLA, Fabrizio; TERENZI, LUCAAuthorshttp://hdl.handle.net/20.500.12386/33500HandleiALMA-TEC-SPE-IAB-001Number Science and Technology in Italy	  For the upgraded ALMA Observatory - TECHNOLOGY DEVELOPMENT -      iALMA Cryofacility dry-run specifications  Document code: iALMA-TEC-SPE-IAB-001-A Status: DRAFT Date: 19/12/2014  Prepared by   Name Organization Date Luca Terenzi Fabrizio Villa Uni E-campus INAF/IASF-Bologna INAF/IASF-Bologna 21/11/2014 Approved by   Name Organization Date Fabrizio Villa   INAF/IASF-Bologna          iALMA cryofacility dry-run specification ID: iALMA-TEC-SPE-IAB-001-A Version: A Status:  DRAFT Date: 21/12/2014 Page: 2/17       2 1 Change Record  Version Date Affected sections Reason A 21/12/2014 All First issue                 iALMA cryofacility dry-run specification ID: iALMA-TEC-SPE-IAB-001-A Version: A Status:  DRAFT Date: 21/12/2014 Page: 3/17       3 2 Distribution List Leonardo Testi ESO ltesti@eso.org Fabrizio Villa INAF/IASF-Bologna villa@iasfbo.inaf.it Francesco Cuttaia INAF/IASF-Bologna cuttaia@iasfbo.inaf.it Pavel Yabougov ESO pyagoubo@eso.org Brian Ellison STFC-RAL brian.ellison@stfc.ac.uk Sara Ricciardi INAF/IASF-Bologna ricciardi@iasfbo.inaf.it Luca Terenzi Uni E-Campus  INAF/IASF-Bologna terenzi@iasfbo.inaf.it                                           iALMA cryofacility dry-run specification ID: iALMA-TEC-SPE-IAB-001-A Version: A Status:  DRAFT Date: 21/12/2014 Page: 4/17       4 3 Applicable and reference Documents    iALMA cryofacility dry-run specification ID: iALMA-TEC-SPE-IAB-001-A Version: A Status:  DRAFT Date: 21/12/2014 Page: 5/17       5 4 Table of content   1	   Change Record ....................................................... 2	  2	   Distribution List ................................................... 3	  3	   Applicable and reference Documents .................................. 4	  4	   Table of content .................................................... 5	  5	   Introduction and Scope .............................................. 6	  6	   Goal and Specification of the Dry-Run Test .......................... 7	  7	   Definition of the Cryofacility for the Dry-Run test. ................ 7	  7.1	   Vacuum Vessel ................................................... 8	  7.2	   Cryocoolers .................................................... 10	  7.2.1	   4K cooler ................................................... 10	  7.2.2	   20K cooler .................................................. 11	  7.3	   Sensors and probes ............................................. 11	  7.4	   Electrical Ground Support Equipment ............................ 13	  7.4.1	   Instrumentation to read sensors: ............................ 13	  7.4.2	   Computer Software and hardware .............................. 14	  8	   Connection of the coolers and pumps in the IASFBO crane room ....... 17	  8.1	   Electrical connections ......................................... 17	  8.2	   Water cooling connections ...................................... 17	       iALMA cryofacility dry-run specification ID: iALMA-TEC-SPE-IAB-001-A Version: A Status:  DRAFT Date: 21/12/2014 Page: 6/17       6 5 Introduction and Scope The iALMA Cryofacility consist of a 2x1 meter Cryofacility that will permit to test the ALMA band 2+3 cartridge at operational conditions. The Cryofacility will be setup at INAF/IASF-Bologna.  Figure 1: layout of the iALMA cryofacility @ IASFBO.   The Cryofacility is constituted by the following units: - a Vacuum vessel - Cryocoolers - Vacuum pumps - Sensors and probes - Electrical Ground Support Equipment A dry-run test is foreseen to check the vacuum/thermal and electrical functionalities of the Cryofacility.  Scope of this document is (i) To define the specification and goal of the dry-run test of the Cryofacility (ii) To define the configuration of the Cryofacility for the dry-run test (iii) To define the interfaces between the various Cryofacility units specifically for the dry-run.   iALMA cryofacility dry-run specification ID: iALMA-TEC-SPE-IAB-001-A Version: A Status:  DRAFT Date: 21/12/2014 Page: 7/17       7  6 Goal and Specification of the Dry-Run Test Scope of the dry-run is to check the functionality of the Cryofacility, the vacuum capabilities and the thermal interfaces.  The test configuration foresees two cooler, one at 4K and the other at 20K. Shields will be connected to intermediate stages of coolers if present. Hereafter the main thermal/vacuum specifications are listed.  The cryofacility shall reach an operative pressure of < 10-4 mBar (TBC)  The cryofacility 4K flange will be operating at a temperature lower than 4.2 K with a maximum heat load of 1 W (parasitics included)  The cryofacility 20K flange will be operating at a temperature lower than 20.0 K with a maximum heat load of 3 W (parasitics included)  A heat load curve (Power vs Temperature) will be produced for the control stages at 4 K and 20 K. The procedure developed for the heat load curve measurement will be used periodically to check the facility performance stability.   7 Definition of the Cryofacility for the Dry-Run test.  The proposed configuration for the dry-run is reported in Figure 2. Three controlled temperature interfaces are located at 4K, 20K and 300K. Two shields are thermally connected to the intermediate temperature stages of the coolers providing a stable thermal environment surrounding the 4K and 20K interfaces. Temperature sensors will be connected to the shields to monitor the temperatures in different points. Description and specifications of the various components will be used are reported in the following subsections.   iALMA cryofacility dry-run specification ID: iALMA-TEC-SPE-IAB-001-A Version: A Status:  DRAFT Date: 21/12/2014 Page: 8/17       8  Figure 2: layout of the dry-run. A 90K shield and a 50K shield are foreseen.  7.1 Vacuum Vessel The iALMA vacuum vessel is the same vessel as used for the Planck/LFI Radiometer Chain Assembly ground calibration (REFERENCE) as seen in Figure XX.   INSERT FIGURE HERE Figure 3: picture of the vacuum vessel as used in Planck/LFI calibration campaign  In the main plate of the vessel, 16 holes are present to accommodate the coolers, the vacuum pumps and the feed-through for electrical connections. The holes map is reported in Figure 4.  iALMA cryofacility dry-run specification ID: iALMA-TEC-SPE-IAB-001-A Version: A Status:  DRAFT Date: 21/12/2014 Page: 9/17       9  Figure 4: hole's map in the cryofacility main plate with dimensions and hole numbering.   iALMA cryofacility dry-run specification ID: iALMA-TEC-SPE-IAB-001-A Version: A Status:  DRAFT Date: 21/12/2014 Page: 10/17      10 7.2 Cryocoolers The following cryocoolers will be used 7.2.1 4K cooler The 4K cooler is the Sumitomo Heavy Industries Ltd, model SRDK-415D with the compressor unit F-50H. The main specifications are:  - Cooling Capacity 1st stage:   35 / 45 W at 50 K (50/60Hz) - (Vertical Position) 2nd stage:  1.5 W at 4.2 K (50/60Hz) - Lowest Temperature < 3.5 K -- for reference only - Ambient Temperature Range 5 to 35 deg.C (28 to 35 deg.C with cooling capacity loss max. 5%) The 4K cold head interface drawings are reported in Figure 5.   Figure 5: interface drawings of the 4K cold head unit   iALMA cryofacility dry-run specification ID: iALMA-TEC-SPE-IAB-001-A Version: A Status:  DRAFT Date: 21/12/2014 Page: 11/17      11 The custom adapter flange permits to connect the cooler to the Cryofacility. The drawing of the adapter is reported in ANNEX (TBD)  7.2.2 20K cooler TBW  7.3 Sensors and probes Temperature sensors are foreseen to regularly control the status of the cooler stages and interfaces. The Figure 6 reports a guideline of the location of the temperature sensors and heater that would be used during the dry-run.   The temperature sensors shall permit to monitor the temperature with the resolution of 1mK (TBC) and an accuracy better than 0.1 K in the whole operating temperature range  The temperature sensors shall permit to monitor the temperature with an accuracy better than 0.1 K in the whole operating temperature range  Heaters will be used to control the temperature of various stages with the following specifications:   The 4K control stage will be set at a temperature of 4.50±0.01 K  The 20K control stage will be set at a temperature of 20.00±0.01 K  The stability of both 4K and 20 K control stages will be better than 5 mK/hour (TBC).  The 300 K control stage stability will be better than 0.1 K / day  iALMA cryofacility dry-run specification ID: iALMA-TEC-SPE-IAB-001-A Version: A Status:  DRAFT Date: 21/12/2014 Page: 12/17      12   Figure 6: location of the sensors for the dry-run The sensors type is specified in Table 1:   Table 1: Temperature Sensors ID Location Type Instrument note 50K-T-01 50K flange DT670 CU Instr_5  50K-T-02 50K shield DT670 CU Instr_5  50K-T-03 50K shield DT670 CU Instr_5  50K-T-04 50K shield DT670 CU Instr_5  90K-T-01 90K flange DT670 CU Instr_5  90K-T-02 90K shield DT670 CU Instr_5  90K-T-03 90K shield DT670 CU Instr_5  90K-T-04 90K shield DT670 CU Instr_5  4K-T-01 4K flange GR200 AA Instr_2 - Ch. MON  4K-T-02 4K control GR200 AA Instr_3 - Ch. CTRL  4K-T-02R 4K control GR200 CU Instr_3 - Ch. CTRL Redundancy 15K-T-01 15K flange CX1050 AA Instr_2 - Ch. MON  15K-T-02 15K control CX1050 CU Instr_2 - Ch. CTRL  15K-T-02R 15K control CX1050 AA Instr_2 - Ch. CTRL Redundancy 300K-T-01 300K control DT670 CU Instr_4 - Ch. CTRL   iALMA cryofacility dry-run specification ID: iALMA-TEC-SPE-IAB-001-A Version: A Status:  DRAFT Date: 21/12/2014 Page: 13/17      13 ID Location Type Instrument note 300K-T-01R 300K control DT670 CU Instr_4 - Ch. CTRL    The heaters are specified in Table 2.  Table 2: heaters ID Location Type Instrument note 4K-H-01 4K control Minco heater Instr_3 - CTRL A  15K-H-01 15K control Minco heater Instr_2 - CTRL A  300K-H-01 300K control Minco heater Instr_4 - CTRL A   In addition, a pressure sensor will be located to control the pressure inside the chamber.   7.4 Electrical Ground Support Equipment The EGSE permits to control and monitor the Cryofacility during operation. It will be constituted by  - Instrumentation to read the sensors and drive the heaters for control  - Computer - Software - Cables  7.4.1 Instrumentation to read sensors: The instrumentation shall permit to monitor and control sensors and heaters with a time rate of 1 second or less  The instrumentation shall permit to monitor the temperatures with a synchronization time less or equal 1 sec.  The following instrumentation will be available at IASFBO:   iALMA cryofacility dry-run specification ID: iALMA-TEC-SPE-IAB-001-A Version: A Status:  DRAFT Date: 21/12/2014 Page: 14/17      14 Table 3: Instrumentation ID Model Monitors/Controls Instr_2 Lakeshore LS340 4/2 Instr_3 Lakeshore LS340 4/2 Instr_4 Lakeshore LS331 2/2 Instr_5 Lakeshore LS218 8/0     Figure 7: connections scheme between sensors, heaters and instrumentation. For each instrument, the total number of channels and controls is displayed (for instance [4/2] means 4 channels and 2 controls).    7.4.2 Computer Software and hardware A dedicated computer shall permit to run the software to acquire, store and analyse the data read by the instrumentation as listed in Table 3.  It is warmly suggested to implement a modular architecture software for future instrumentation upgrades (number and models).  The software shall satisfy the following specifications:    iALMA cryofacility dry-run specification ID: iALMA-TEC-SPE-IAB-001-A Version: A Status:  DRAFT Date: 21/12/2014 Page: 15/17      15 The software shall permit to interface the computer with the instrumentation via IEEE488 interface   The software shall permit to interface the computer with the instrumentation via RS232 interface (1 port) The suggested software is LABVIEW that permit to use dedicated drivers to read and commanding the Lakeshore instrumentation.   The software shall permit to read all the temperature sensors with a sampling rate less or equal to 1 sec   The software shall permit to read all the temperature sensors with a synchronization less or equal to 1 sec   It is not required that all the read temperatures are (perfectly) synchronized in time. However, the need is that, every second, all the temperature shall be read and associated with the right time.  The guideline is to acquire all the data at the maximum rate permitted by the available software and instrumentation.   The software shall provide the possibility of a quick look monitoring for all the sensors  The software shall provide a control panel to command the instrumentation both in real time and in a programmable way. The proposed solution is to have the following layout on computer screen:   iALMA cryofacility dry-run specification ID: iALMA-TEC-SPE-IAB-001-A Version: A Status:  DRAFT Date: 21/12/2014 Page: 16/17      16  Figure 8: Example of the layout on the screen for quick look analysis and instrument commanding.  For each thermal interface (4K, 15K, 50K, 90K, and 300K), a real-time graphic representation will permit to see temperature trend. It should be possible to select the appropriate temperature sensor to display. A control panel box should permit to select the Lakeshore instrument and command it in real time or programming the control loop (i.e. select the control loop and its PID parameters, select the sampling rate to save data onto a file, filename, directories, etc… ).   The software shall permit to read, store and backup all the data with a selectable sampling rate  The implementation should permit to select the acquisition rate and data storage rate among different values. For instance 1sec, 5sec, 10sec, 30sec, 60sec (TBC). This is useful in case of long acquisition times.   The computer and operating system shall satisfy the following requirements:  - Operating system: Windows 7 PRO (TBC) + Virtual machines  iALMA cryofacility dry-run specification ID: iALMA-TEC-SPE-IAB-001-A Version: A Status:  DRAFT Date: 21/12/2014 Page: 17/17      17 - Storage capability to store data for TBD days continuously - Internet connection - Backup unit (TBC)   8 Connection of the coolers and pumps in the IASFBO crane room  8.1 Electrical connections TBD  8.2 Water cooling connections TBD                

iALMA Cryofacility dry-run specifications

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iALMA Cryofacility dry-run specifications

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