We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Tunneling Magnetoresistance DC Current Transformer for Ion Beam Diagnostics.
- Authors
Azab, Eman; Hegazy, Yasser G.; Reeg, Hansjoerg; Schwickert, Marcus; Hofmann, Klaus; Ferri, Giuseppe
- Abstract
In this paper, open loop and closed loop Tunneling Magnetoresistance (TMR) DC Current Transformers (DCCTs) for ion beam diagnostics are presented. The DCCTs employ MR sensors to measure the DC component of the accelerator's ion beam. A comparative study between Giant Magnetoresistance (GMR) and TMR sensors is presented to illustrate the sensor selection criterion for the DCCT application. The two proposed DCCTs are studied in open and closed loop configurations. A closed loop feedback electronic system is designed to generate a feedback current equivalent to the ion beam current such that the sensor operates at zero flux. Furthermore, theoretical and experimental results for the TMR-based DCCT including noise analysis are presented for both open loop and closed loop configurations. Both configurations' minimum detectable currents are in the range of microampere. The proposed closed loop hardware prototype has a settling time of less than 15 μs. The measured minimum detectable currents for the open and closed loop TMR-based DCCTs are 128.2 μA/ Hz and 10.14 μA/ Hz at 1 Hz, respectively.
- Subjects
DC transformers; TUNNEL magnetoresistance; CURRENT transformers (Instrument transformer); ELECTRONIC systems; GIANT magnetoresistance; ION beams
- Publication
Sensors (14248220), 2021, Vol 21, Issue 9, p3043
- ISSN
1424-8220
- Publication type
Article
- DOI
10.3390/s21093043