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Title: Direct Probe Mounted High-Performance Amplifiers for Pulsed Measurement

High electrical noise and short time scales of pulsed magnets create significant challenges for electrical measurements, particularly in the sub-MHz frequency window, where bulk of the transport measurements is routinely conducted. The proper design of the first stage of signal conditioning and amplification is the critical step in increasing sensitivity of the measurements in such a harsh environment. We developed a custom instrumentation amplifier to implement a number of noise-reducing features for pulsed field measurements. The amplifier utilizes single-chip design based on recently released AD8421 [1]. The preamp design has proven to be successful and is now being implemented on a variety of probes. The design is continuously being revised and updated as better preamp chips become available.
Authors:
 [1] ;  [1] ;  [2] ;  [2]
  1. Florida State Univ., Tallahassee, FL (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
OSTI Identifier:
1114404
Report Number(s):
LA-UR--14-20074
DOE Contract Number:
AC52-06NA25396
Resource Type:
Technical Report
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE; NSF
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE High Magnetic Field Science