Supply, installation and commissioning of Ultra Low-temperature Cryostat with Measurement system.

Supply, installation and commissioning of Ultra Low-temperature Cryostat with Measurement system.

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Indian Institute of Science Education and Research Bhopal

Annexure-I(b)

Technical Compliance Sheet

Tender No.: IISERB/SP/2025-26/99 Dated 10.02.2026

Item: Supply, installation and commissioning of Ultra Low-temperature Cryostat with Measurement system.

Description: IISER Bhopal requires a cryogen-free Ultra Low-temperature Cryostat with Measurement system with temperature of operation in the range from 400 K down to ≤ 400 mK and magnetic fields up to ±9 Tesla. The system should be fully cryogen free i.e. no requirements for liquid helium or Liquid nitrogen at any point. The system should be fully automated, and computer controlled with the latest technology for instrument interfacing and control in whole range of measurements. The system should be capable of measuring Material properties for bulk, thin film, single crystal samples and must be a proven one, i.e., the performance of the system must be acknowledged by a significant number of users. All measurement options must be mutually swappable with existing Ultra Low-temperature Cryostat with Measurement system Dynacool system, such that any module can be installed or removed without permanent modification to the base system, cryostat, magnet, or control infrastructure. The system architecture shall support shared use of the same platform, sample space, and control electronics where applicable. Prospective vendors should also provide other accessories and facilities, including UPS and Water Chiller for smooth installation and uninterrupted operation of the equipment.

System Basic requirements: a) The system should be completely cryogen-free. Vendor should specify the amount of He Gas required for the initial cooldown. b) The startup time from totally warm system must be efficient and preferably within ≤ 16 hrs. a) A data for initial cooldown with log data files must be given. Vendors may be asked for a demonstration during technical evaluation. c) An integrated cryopump and vacuum gauge for controlling the sample environment is desired. High vacuum in Sample chamber should be achievable within 10 minutes. d) Data for High vacuum achieved with Log files has to be provided by the vendor. e) Low temperature operations must be completely automated and user friendly. Vendors should specify their temperature control mechanism for achieving low temperature. Any mechanism of temperature control through mechanical means like needle valve is not preferred. Demonstration will be asked during technical evaluation. f) All the pumps must be dry pumps and should completely be integrated with the system and software. Details of the pumps and vacuum fittings must be provided. g) All communications on the system must either use a Universal Serial Bus (USB), Controller Area Network (CAN) or similar high speed and high-fidelity communications protocols. h) The live sample temperature and magnetic field should be displayed somewhere on the cryostat cabinet for easy monitoring of the system.

Magnet specifications: a) Magnetic field of ± 9 Tesla with a Magnet charging time of ≤ 10 minutes for 0 to 9T is required. b) Magnetic Field ramping data with log data files at maximum rate should be provided. Demonstration may be asked during technical evaluation. c) The magnet charging or control modes should be completely software integrated. At the least, there should be linear, oscillating, and no overshoot mode. Vendors should provide data with log files for the magnetic field overshoot in the ‘no overshoot’ mode for field strengths of 1, 3 and 9 Tesla.

Temperature Control specifications: a) System must achieve quick and precise temperature control. It should offer fully automated, low temperature operation of < 4.2 K for a continuous long time. b) Fully automated cooling & warm up operation should be possible in the temperature range of 400 K to 1.9 K. The time required for a cooling down from 400 K to 1.9 K and vice-versa should both be under 45 minutes. Provide supporting data with data files. Demonstration will be asked during technical evaluation. c) The system must be able to hold the measurement temperature within 0.1% in the temperature range of ≤1.9 K to 20 K under magnetic fields of up to 9T and within 0.02% at temperatures of 20 K to 400 K. Demonstration will be asked during technical evaluation. d) Provide temperature stability data with Log files at ≤ 1.9 K at a magnetic field of ± 9 T. Data should be in temperature versus time format collected in the following manner: i) Set sample temperature to 1.9 K at zero-field ii) Stabilize sample temperature at 1.9 K for 10 min iii) Continuously ramp magnetic field to 9 T while recording the temperature Vendor should provide recorded data with log data files in a, clearly indicating the steps as specified above. Vendors may be asked for a demonstration during technical evaluation. e) Provide data of thermal cycling with Log data files in the following steps: 1. Start from 300 K and set temperature to 2K, move up to 400K and set again to 2K Repeat the above process for 5 cycles 2. Finally, once the system reached 2 K for the last time, ramp the field (as fast as it could) to full field (9 T). Then, finally, the field oscillates back to 0 T. f) Vacuum pumping and fittings: i. Vacuum pumping system is essential for the uninterrupted functioning of instrument and its various measurement options must be included. ii. All pump must be dry pumps with extra Tip seal kit (at least 01 qty extra). The system should not include any oil-based pump. iii. The system should have an integrated Cryopump and necessary vacuum gauges for controlling the sample environment. This fully integrated option should allow changing the chamber environment during a programmed sequence or script. The Cryopump should be able to pump out the sample chamber to less than 10-4 Torr (Ultra High vacuum) in under 10 minutes. Turbo Molecular pumps for high vacuum applications are not acceptable.

Measurement Options: 1) Electrical Transport Measurement: (a) Temperature Range: ≤1.9 K to 400 K (or above) (b) Provision for 4-wire & 2-wire resistivity and Hall effect measurement (c) Provision for measuring I-V characteristics and differential resistance measurement (dV/dI vs. I or dV/dI vs V) (d) Two built-in independent sources and meters must be provided to make the two measurement channels truly independent. (e) In addition to standard mode (4-wire resistance from 10 μΩ up to 10 MΩ), there should be high impedance mode of 2 wire resistance measurement up to 5 GΩ. (f) Current Source: DC & AC, 10 nA (or less) to 100 mA (or more), frequency for ac source: Continuous from 0.2 Hz to 200 Hz (g) Resistance sensitivity: 10 nΩ. (h) Set up to check the contacts prior to measurement (i) At least 3 publications should be attached to varify measurements, accuracy and supported temperature range from 1.9 K to 400 K.

2) Sample Rotator: a) To measure angular dependence Electrical properties including resistivity, Hall effect, I-V Characteristics in an axis perpendicular to vertical magnetic field. b) Sample Rotator should have easily mountable/ dismountable PCB sample loading platform with gold pads for electrical connections. It should be capable of mounting 2 samples and should have thermometer to closely monitor sample temperature. c) Option must include a computer-controlled stepper motor offering resolution of 0.0015 Deg/step. A thermometer must be in direct contact with the sample mount so as to enable accurate determination of sample temperature. d) Angle of rotation between zero to 360° must be provided in order to change the orientation of the applied magnetic field relative to the installed sample. e) Sample Rotator must be usable in the entire temperature range of ≤ 1.9 K to 400K or larger and support resistivity measurements. f) Measurement data of angular dependence of magnetoresistance in zero to 360 deg rotation must be provided. Demonstration may be asked during technical evaluation. g) At least 3 publications should be attached in support of Angle dependent transport measurement from the quoted instrument.

3) Heat Capacity: a) Temperature Range: 1.9 K – 400 K. Provide supporting information to validate the supported temperature range. Demonstration may be asked during technical evaluation. b) Measurement should utilize relaxation technique, two-tau model fit analyses, corrections of back grounds from sample platform and adhesives through main system software. Claim needs to be supported by references of the papers published and patents. c) Sample Mass: Typically, few mg. d) Measurement Accuracy: better than 5% over 2K – 300K. e) Heat Capacity resolution: less than 10 nJ/mole.K at 2 K temperature. Vendor must submit measurement data with log data files in support of resolutions claimed. f) Measurements in a static applied magnetic field must be possible. g) Thermometers must be on the platform. h) Option software must allow Slope-fitting analysis mode in post processing for high resolution sampling of first-order transitions. i) A sample mounting station should be included to ensure hassle-free sample mounting. j) At least 3 publications should be attached in support of Heat capacity measurement from 1.9 K – 400 K by the quoted instruments.

4) Helium-3 Refrigerator: (a) Temperature range of ≤400 mK to 350 K or wider. Vendor should provide data for the supported temperature range. Demonstration may be asked during technical evaluation. (b) Helium-3 Refrigerator must offer continuous operations up to 500 mK without any restriction. Temperatures range of ≤ 400 mK should be achievable for at least an hour in Single Shot mode. (c) Temperature control accuracy of ± 1% or better. (d) Temperature control Stability of 0.25 % or better. (e) Option must be compatible with AC/DC electrical transport and Heat capacity measurements. Necessary attachments and hardware must be included to perform these measurements. (f) Option should have similar Software user interface and sequence commands as in the main system. All Gas handling operations should be fully automated, and pumping systems should be fully integrated with this option. (g) Vendors must provide Heat Capacity measurement data from highest to lowest temperature using He-3 along with data files. Demonstrations may be asked. (h) Vendors must provide Electrical Transport measurement data from highest to lowest temperature using He-3 along with data files. Demonstrations may be asked. (i) At least 3 publications should be attached in support of the Heat Capacity measurement up to He-3 Temperature range by the quoted instrument.

5) Data acquisition and analysis: a) Licensed Windows based operating software and computer control system compatible with the measurement options. b) Sample measurement should be fully automated. The software should control all aspects of the instrument’s electronics, hardware, gas handling, data acquisition and data analysis. The software should include a comprehensive sequence editor for setting up unattended measurement runs. Each user must be able to set their own measurement sequences and data files so experimental set-ups and data are safe on a multi-user system.

6) Accessories: a) Water Chiller Unit: A high-quality water chiller unit with suitable capacity (5 TR or better) for trouble free continuous running of the main system should be offered. b) UPS: A suitable UPS system with sufficient capacity (~40 KVA) for the main system as well as chiller unit with compressor should be included in the offer.

7. Future Upgrades: The system must be field upgradable to add measurement options including Dilution refrigerator option for mK operation, AC Susceptibility up to 50mK, Heat Capacity up to 50mK, Broadband ferromagnetic resonance, Torque Magnetometry, Thermal expansion measurements like Dilatometer, Magneto-optic measurements. All measurement options must be mutually swappable with existing Ultra Low-temperature Cryostat with Measurement system Dynacool system, such that any module can be installed or removed without permanent modification to the base system, cryostat, magnet, or control infrastructure. The system architecture shall support shared use of the same platform, sample space, and control electronics where applicable. The vendor must provide supporting datasheets and technical documentation for the base system and each optional module, clearly demonstrating compatibility, performance specifications, operating temperature ranges, and upgrade paths.

8. Other Details: a) The requested measurement data along with log data files should be send within the tender deadline date to [email protected] . b) Vendors must provide a detailed compliance statement addressing each technical specification listed in the tender document. Compliance shall be supported by manufacturer’s datasheets, technical literature, and relevant published papers wherever applicable. Mere affirmation of compliance (e.g., stating “Yes” in the compliance sheet) without supporting technical data, performance specifications, or measurement evidence shall not be accepted. c) Warranty: Minimum 1 year from the date of installation. d) The offer must be supported with the measurement data and published papers in support of all claimed specifications. e) Technical evaluation may include demonstration to verify functionalities and capabilities of the system quoted. Institute would also ask for Sample measurement if required and vendors will be provided 3 weeks’ time for arranging such demonstration within India and should be prepared accordingly. f) The vendor shall provide a list of similar equipment supplied and installed in India during the last five (5) years, including the name of the end user, contact person’s name, postal address, phone number, and email ID. Preference will be given to vendors who have supplied and successfully installed at least twenty (20) similar systems during this period. g) Installation and comprehensive operational training shall be provided at the user site by qualified service engineers. Preference will be given to vendors who have factory-trained service engineers based in Bhopal, Indore, or nearby regions, ensuring prompt installation, effective training, and timely post-installation support.

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Indian Institute of Science Education and Research Bhopal

Annexure – II

TECHNO-COMMERCIAL BID

Tender No.: IISERB/SP/2025-26/99 Dated 10.02.2026

Item:Item: Supply, installation and commissioning of Ultra Low-temperature Cryostat with Measurement system.

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