Continuous Fiber Bragg Grating Optical Sensors for Superconducting Magnet Quench Detection: The Effects of Attenuation and Position in the Array

Ludbrook, Bartholomew M.; Haneef, Shahna M.; Huang, Xiyong; Gonzales, Jofferson; Davies, Mike; Duke, Owen; Salazar, Erica; Badcock, Rodney A.

doi:10.1109/tasc.2023.3244762

Cited by 6 publications

(3 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For a superconducting machine, there are additional failure modes which can occur if the winding experiences a quench event. Winding monitoring and quench prevention will be critical for safety in aviation applications and our colleagues at the Robinson Research Institute are actively engaged in this area [20,21].…”

Section: Important Parameters For Aviation Usementioning

confidence: 99%

Cooling of Superconducting Motors on Aircraft

Caughley,

Lumsden,

Weijers

et al. 2024

Aerospace

Self Cite

View full text Add to dashboard Cite

Superconducting electric motors are required in order to deliver lower-carbon aviation. Critical to the success and viability of operating superconducting electric motors in aviation is keeping the superconducting coils at their operating temperature. This paper examines the challenges of keeping a superconducting motor cold if it were used on a single aisle passenger aircraft such as an Airbus A320. The cooling problem is defined and different cooling scenarios are investigated to determine viability. The investigation has shown that for a motor with a superconducting rotor only (copper stator), a Stirling-type cryocooler would be sufficient. However, if the motor is to be fully superconducting, then the cooling loads of the stator, which are much higher, make mechanical refrigeration impractical and the only option is to cool the motor with the heat sink of a liquid hydrogen fuel.

show abstract

Section: Important Parameters For Aviation Usementioning

confidence: 99%

Cooling of Superconducting Motors on Aircraft

Caughley,

Lumsden,

Weijers

et al. 2024

Aerospace

Self Cite

View full text Add to dashboard Cite

show abstract

“…Numerous research efforts have been made to investigate quench behaviors so far. For instance, quench detection, magnet diagnostics, and instrumentation techniques [2][3][4][5][6][7][8][9][10][11][12][13][14] have been considerably studied to investigate NI REBCO magnet quench. As a result, various quench simulation models [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] have been proposed, and it has been demonstrated that they are practicable in replicating quench voltage and the corresponding current distribution to some degree.…”

Section: Introductionmentioning

confidence: 99%

An experimental study to investigate magnetic field and winding force-dependent contact resistance of NI REBCO coil

Bang,

Bradford,

Lee

et al. 2024

Supercond. Sci. Technol.

View full text Add to dashboard Cite

This paper reports the magnetic field and winding force-dependent contact resistance, also known as characteristic resistance, of no-insulation (NI) REBCO coil. Three NI coils were wound with different winding forces (<1 kgf, 3 kgf, and 5 kgf) using the same REBCO-coated conductor, and they were tested at 4.2 K in a background field of 0, 5, 10, and 14 T. The contact resistance of each coil is measured at each field. As a result of the measurements, we draw two conclusions. First, a quadratic function for magnetic field intensity reasonably reproduces the measurement results of each NI test coil's magnetic field-dependent contact resistance, where the practical fit function's coefficients are determined depending on the winding force. Second, the contact resistance of each coil is partially inconsistent with the magnetoresistance of the electroplated material, i.e., copper, of the REBCO-coated conductor. This paper will present the measurement results in detail, discuss them with Kohler's rule, and formulate the contact resistance using winding force and magnetic field terms.

show abstract

“…They can be used in conditions where classical voltage-based sensors fail or become unreliable due to high electromagnetic fields or other extreme conditions, as is the case of the superconducting magnets used in fusion reactors. 1,2 There, multiple fiber Bragg gratings (FBGs) centered at the same wavelength (continuous FBG) are inscribed in the fibers to create a distributed sensor that allows for very fast hot-spot detection virtually anywhere along the cable.…”

Section: Introductionmentioning

confidence: 99%

Mitigation of radiation-induced attenuation of optical fibers through photobleaching: study of power dependence at cryogenic temperatures

Solis Fernandez,

Ludbrook,

Schuyt

et al. 2024

Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2024

View full text Add to dashboard Cite

Radiation-induced attenuation can pose a great challenge to the implementation of optical sensors in extreme environments. Photobleaching is known to mitigate the damage caused by radiation but a lot is yet to be investigated. In this work, we look at the power-dependence of the photobleaching phenomenon at cryogenic temperature. We used three standard fibers carrying around 2mW of light at 1550nm and 4, 0.4, 0.09 of the light at 1050nm respectively; and a fourth standard control fiber that carried no photobleaching light. We observed a large reduction in radiation-induced attenuation in all of the fibers with light at 1050nm when compared to the control fiber. This reduction, however is not linear and saturates for higher powers. These results are consistent with our theoretical models.

show abstract

Continuous Fiber Bragg Grating Optical Sensors for Superconducting Magnet Quench Detection: The Effects of Attenuation and Position in the Array

Cited by 6 publications

References 20 publications

Cooling of Superconducting Motors on Aircraft

Cooling of Superconducting Motors on Aircraft

An experimental study to investigate magnetic field and winding force-dependent contact resistance of NI REBCO coil

Mitigation of radiation-induced attenuation of optical fibers through photobleaching: study of power dependence at cryogenic temperatures

Contact Info

Product

Resources

About