BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Measuring Installation for Determining Current-Voltage Characteris
 tics at Liquid Helium Temperature
DTSTART;VALUE=DATE-TIME:20200713T131000Z
DTEND;VALUE=DATE-TIME:20200713T131100Z
DTSTAMP;VALUE=DATE-TIME:20260520T035426Z
UID:indico-contribution-1776@indico.inp.nsk.su
DESCRIPTION:Speakers: Alexandr Brodnikov (inp.nsk.su (l.8-2))\nMeasuring p
 lant are made on the base of cryostat КГ-60/300-1 in internal cavity of 
 which\, in liquid helium medium\, solenoid is located\, and in its central
  part insert-holder with sample is located. Power supply of solenoid and t
 ested sample\, by current leads located in the upper cover of cryostat\, a
 re performed by power supplies of Danfysik - system 8800 company with the 
 help of PC and control program developed in BINP. In order to test the pla
 nt for determination of current–voltage characteristics (CVC) in superco
 nductors at helium temperatures\, test measurements were carried out accor
 ding to the method MVI 400-423/8-2018 developed by JSC VNIINM [2]. Measure
 ments were made on composite wire samples based on the Nb-Ti alloy\, 0\,08
  m long and 0\,5 and 0\,85 mm diameters cut from the wires of standard bat
 ches\, with CVC being indicated by the manufacturers of these superconduct
 ors. He calculated value of the critical current specified by the manufact
 urer of the measured superconducting wires at the 7 T shall be 200 A and 3
 72 A. The value we have obtained is 212 A and 382 A\, which is less than 1
 0% [4] and this corresponds to the limit of the permissible basic absolute
  error of the meter В7-99 which is ± (1\, 5·10-3 + 4\, 5·10-5 | U |) m
 V (U - measured voltage\, mV). As can be seen\, the operability of the mea
 suring unit for determining the actual critical current values is confirme
 d\, and obtaining a more accurate measurement result will allow modern pre
 cision digital measuring equipment\, with the permissible basic absolute e
 rror of ± 0\,0025%+ 0\,02 nV.\n\nhttps://indico.inp.nsk.su/event/24/contr
 ibutions/1776/
LOCATION:
URL:https://indico.inp.nsk.su/event/24/contributions/1776/
END:VEVENT
END:VCALENDAR