1. Level (Type) of work: Master/PhD thesis.

 

2. Topic: Design of closed cycle pulse tube cryocooler to obtain helium level of temperatures.

 

3. Work objective: Development of the first in Russia cryocooler with further introduction into production.

 

4. Short description: The development belongs to cryogen-free technologies, i.e. obtaining of low temperatures without using liquid nitrogen and helium. The available equipment: analogous cryocoolers by CRYOMECH Company, vacuum cryostat, necessary vacuum equipment by VARIAN Company, control and measurement of temperature, compressor by LEYBOLD Company.

 

The work is carried out in the cryogenic research group of FLNP JINR (www.cryogenics.su). The photo presents a cryocooler manufactured in FLNP.

 

Applications of pulse tube cryocoolers

 

· In engineering:

• to cool:

• superconducting energy storage systems;
• superconducting engines;
• superconducting transformers;
• superconducting cables;
• superconducting magnets without using liquid helium and nitrogen.
• high-sensitive infrared radiation detectors.

• they are a component part of:

• cryogenic high-vacuum pumps;
• liquid helium recondensers;
• liquid sodium recondensers.

• for thermostating:

• magnetometers;
• superconducting quantum-mechanical magnetometers.

 

· In nanotechnologies:

• in ultrahigh vacuum cryostats to cool:

• manipulators;
• scanning microscopes.

 

· In science:

• used or may be used in cryostats for the following investigations in a wide temperature range from 2.5 to 300 K:

• optical;
• magneto-optical;
• X-ray;
• neutron;
• Mossbauer;
• gravitational;
• in magnetic fields;
• electron paramagnetic resonance;
• nuclear magnetic resonance;
• condensed matter state.

 

• used to cool ultra low refrigerators down to 0.005 K (in the process of pumping out ³He, dissolving ³He in ⁴He, adiabatic demagnetization) for investigations in the field of:

• nuclear physics;
• ultralow-temperature detectors;
• semiconductors;
• superconductivity;
• ultracold neutrons.

• used to cool radio-telescopes:

 

· In medicine:

• may find application:

• in magnetic-resonance tomographs;
• for freezing cells and organs;
• for cryomedical dermatological and gynecological surgeries.

 

5. Required skills and knowledge: Education: physical & engineering, specialization in cryogenics or low temperatures.

 

6. Minimum required time: 3 years

 

7. Supervisors: Chernikov Alexander Nickolaevich

 

8. Contact phone number and e-mail:

8-49621-62769 This email address is being protected from spambots. You need JavaScript enabled to view it. or This email address is being protected from spambots. You need JavaScript enabled to view it.