Probe for electrical measurements in magnetic field and at cryogenic conditions

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F22%3APR36336" target="_blank" >RIV/00216305:26620/22:PR36336 - isvavai.cz</a>

Result on the web

<a href="https://github.com/MatSevy/CEITEC-MOTES-VLTP" target="_blank" >https://github.com/MatSevy/CEITEC-MOTES-VLTP</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Probe for electrical measurements in magnetic field and at cryogenic conditions

Original language description

To extend usage options of a Cryogen Free Magnet (CFM) system, located in a laboratory of Electron Paramagnetic Resonance (EPR) spectroscopy at CEITEC VUT, a Very Low Temperature Probe (VLTP) was developed for electronic measurements at cryogenic temperatures. The VLTP was designed to be compatible with a Variable Temperature Insertion (VTI) system which is adjustable cryostat inside the CFM and allows to control temperature of a sample in rage from 2 K to 325 K. The probe is assembled of a probe head on the top, a body that has a shape of a long prism, an outer tube and a bayonet socket attached to a coupler at the bottom. The probe head has a cylindrical shape and is made of aluminium. On sides of the probe head are four ports, and one port is on top. Two ports on sides are occupied by 11 and 16-pin hermetically sealed connectors. Other ports are sealed by a blank-off covers. The body is made of three hollow nonmagnetic stainless-steel tubes, which have a low thermal conductivity and are placed in a triangle. On one side the tubes are attached to the probe. On another side the body is ended by a copper radiation shield that reflects Infra-Red (IR) radiation. A coupler made of PEEK is placed between this radiation shield and bronze bayonet socket to further reduce a heat transfer. Other radiation shields are placed along the body and serve also as its reinforcement. Thanks to this design, the VLTP can achieve temperature difference of 300 K at length of 94 cm (average thermal gradient is about 3 K/cm). The body is covered by an outer tube when probe is loaded via airlock into the cryostat and provide a hermetical sealing up to a bottom of the probe head. A PEEK coupler is equipped by three 8-pin connectors, and the bayonet socket is compatible with a sample holders used for EPR measurements. Two connectors are connected via phosphor-bronze wires to the hermetic 16-pin connector dedicated for electronic measurements, and the last one is connected to the 11-pin con

Czech name

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Czech description

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Type

G_funk - Functional sample

CEP classification

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OECD FORD branch

20201 - Electrical and electronic engineering

Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Internal product ID

Very low temperature probe

Numerical identification

178977

Technical parameters

Lowest achieveble temperature: <2 K (tested down to 1.8 K with sensor holder) Maximum operating temperature: 325 K (theoreticaly up to 380 K) Maximum magnetic field: 16 T Available contacts: 16 + 8 (Free + reserved for sensors and a heater) Blank ports: 2 +1 (sides + top of probe head) Active lenght: 94 cm (without holder)

Economical parameters

Cost: All construction materials: approx. 31 000 CZK Workload on prototype: approx. 18 500 CZK Benefit: Difference between calibrated and uncalibrated cryogenic temperature sensor: approx. 13 500 CZK Used for a sensor calibration (so far): 6x

Application category by cost

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Owner IČO

00216305

Owner name

Vysoké učení technické v Brně

Owner country

CZ - CZECH REPUBLIC

Usage type

A - K využití výsledku jiným subjektem je vždy nutné nabytí licence

Licence fee requirement

A - Poskytovatel licence na výsledek požaduje licenční poplatek

Web page

https://github.com/MatSevy/CEITEC-MOTES-VLTP