External users: registration to be carried out only through I-STEM portal
Additional information about sample and analysis details should be filled in the pdf form provided in the I-STEM portal under “DOWNLOAD CSRF”
Internal users (IITB): registration to be carried out only through DRONA portal
Additional information about sample and analysis details should be filled in the pdf form provided here.
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Category
- Services » Service
Booking Details
Facility Management Team and Location
Facility Features, Working Principle and Specifications
Facility Description
Liquefaction of Helium gas
The process gas (Helium) is compressed and undergoes isentropic expansion via Turbines until the Helium temperature falls below the inversion temperature. Then, isenthalpic expansion in the Joule-Thomson device and helium gas is liquefied, stored in a dewar at slightly above atmospheric pressure.
Main parts of the helium plant
- Recirculation compressor
- Oil Removal System
- Buffer Vessel
- Cold Box
- Dewar
- Recovery gas bag
- Recovery compressor
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Sample Preparation, User Instructions and Precautionary Measures
New Guidelines for users to collecting LHE
- Submit a request through the Drona portal: Click Here!
- The LHE facility operator will assign the applicable charges based on the requested quantity.
- The assigned charges will go to the respective Guide/Faculty via email or the Drona portal.
- The Guide/Faculty must approve the assigned charges/funds.
- After approval, the LHE facility operator will provide the slot for the user to collect LHE.
- The collection slot, The user will receive the slot by email.
- On the scheduled slot, the user must bring their LHE container to collect LHE.
Users need to follow cryogenic safety guidelines.
Charges for Analytical Services in Different Categories
| Cost of 100 lt He using recovered gas | If Dewar is cold | If Dewar is warm |
| 99.5% and above purity return gas | Rs. 12045 | Rs. 17303 |
| 98.5 to 99.5% purity return gas | Rs. 16606 | Rs. 21865 |
| 97 to 98.5% purity return ga | Rs. 21495 | Rs. 26754 |
| 95 to 97% purity return gas | Rs. 28665 | Rs. 33923 |
| 92.5 to 95% purity return gas | Rs. 40069 | Rs. 45327 |
| If the return gas is not equivalent to given liquid then actual cost of the liquid will be charged for the remaining gas (actual cost of 100 lt Rs. 156237) | ||
| Liquid | Return Gas | Cost |
| 1 lt | 0.767725 m3 | Rs. 1562 |
Applications
- NMR, MRI Cooling, Superconducting magnets
- Low-temperature superconductors
- Material Property testing at Low temperature
- Dilution Refrigeration
- PPMS and MPMS
- Cryopreservation of cells and microbes.
Sample Details
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