Performance of a MQXF Nb<sub>3</sub>Sn Quadrupole Magnet Under Different Stress Level
نویسندگان
چکیده
In a dipole or in quadrupole accelerator magnet, the displacement of coil turns induced by electromagnetic forces can cause quenches limiting magnet performance. For this reason, an azimuthal preload is applied to avoid movements up required operational current. However, several tests showed that magnets operate with partial preload, i.e., unloading during ramp does not prevent reaching higher currents. This issue particularly relevant for Nb 3 Sn magnets, where loads filaments reach degradation limits critical order investigate impact on quench performance, MQXFS6 short model High Luminosity Upgrade was tested under pre-load at 80% sample current, 93% current 1.9 K. The then released 60%, still showing ability range 80--85% as HL-LHC project. With lower going above 90% lost, and significant training appeared 85%. When restored original value, reached few 95% (13.4 T peak field). Magnetic measurements confirm larger movement case agree finite element simulations.
منابع مشابه
Conceptual Design of a Permanent Quadrupole Magnet with Adjustable Strength
The conceptual design of a quadrupole magnet is de scribed that uses both permanent magnet material and soft iron. The quadrupole gradient can be adjusted without a ecting the field distribution, and the basic design principle can be used to build dipole and other multi pole magnets.
متن کاملChoice and Performance Under Stress: Are Men and Women Different?
EMOTIONAL LOAD COGNITIVE LOAD General Instructions General Instructions 1. Saliva collection 1 *for a subsample 1. Stress questionnaire 2. Stress questionnaire 2. Induction of cognitive load (Memorize number) 3. Induction of emotional load (Videoclip) 3. SAT Quiz 1 3.1. Videoclip questions 4. Optimism questionnaire 4. SAT Quiz 1 5. Upgrade and Probability questions 5. Optimism questionnaire 6. ...
متن کاملthe role of application of dynamic assessment approach in improvement of iranian efl writing performance at different language proficiency levels
the present study sought to investigate the role of dynamic assessment (da) in improvement of iranian efl writing performance at different language proficiency levels. to this end, after conducting the quick placement test, 60 iranian efl learners were assigned to two groups with different language proficiency levels. in both groups each participant wrote two compositions, one before and one af...
Physiological Performance of Soybean Cultivars Under Salinity Stress
Abstract Two experiments with factorial arrangements on the basis of randomized complete block design in three replications were conducted in 2007 and 2008, to evaluate chlorophyll content index (CCI), fluorescence of chlorophyll, proline content and grain yield of three soybean cultivars (Williams, Zan and L17) under a non-saline (control) and three saline (3, 6 and 9 ds/m NaCl) conditions...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Transactions on Applied Superconductivity
سال: 2022
ISSN: ['1558-2515', '1051-8223']
DOI: https://doi.org/10.1109/tasc.2022.3167369