Numerical calculation for electric propulsion
JAXA Supercomputer System Annual Report April 2020-March 2021
Report Number: R20EDU10500
Subject Category: Space and Astronautical Science
- Responsible Representative: Kazutaka Nishiyama, Department of Space Flight Systems
- Contact Information: Kazutaka Nishiyama(nishiyama@ep.isas.jaxa.jp)
- Members: Yusuke Yamashita, Kazutaka Nishiyama, Takato Morishita
Abstract
We analyze a neutralizer cathode plasma of the microwave discharge ion thruster, which is the main engine of the asteroid explorer Hayabusa and Hayabusa2.
We are conducting numerical analysis to investigate the degradation factors of the neutralizer in Hayabusa and develop the high-performance neutralizers for future missions.
Reference URL
N/A
Reasons and benefits of using JAXA Supercomputer System
In general, the numerical calculation of plasma has a high calculation cost.
We conduct research efficiently with the JAXA supercomputer, which has one of the best calculation performance in Japan.
Achievements of the Year
We analyzed the neutral particle flow inside the discharge chamber of a microwave discharge neutralizer. We investigated the distribution of neutral particle density in the discharge chamber by the DSMC method (Fig. 1). We designed a calculation model of the neutralizer of the Hayabusa2 flight model.
Fig.1: Neutral particle density distribution in the discharge chamber
Publications
N/A
Usage of JSS
Computational Information
- Process Parallelization Methods: MPI
- Thread Parallelization Methods: OpenMP
- Number of Processes: 2 - 12
- Elapsed Time per Case: 6 Hour(s)
Resources Used(JSS2)
Fraction of Usage in Total Resources*1(%): 0.01
Details
Please refer to System Configuration of JSS2 for the system configuration and major specifications of JSS2.
| System Name | Amount of Core Time(core x hours) | Fraction of Usage*2(%) |
|---|---|---|
| SORA-MA | 9,060.69 | 0.00 |
| SORA-PP | 2,877.42 | 0.02 |
| SORA-LM | 0.00 | 0.00 |
| SORA-TPP | 0.00 | 0.00 |
| File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
|---|---|---|
| /home | 246.37 | 0.23 |
| /data | 4,962.29 | 0.10 |
| /ltmp | 2,604.17 | 0.22 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 0.00 | 0.00 |
*1: Fraction of Usage in Total Resources: Weighted average of three resource types (Computing, File System, and Archiver).
*2: Fraction of Usage：Percentage of usage relative to each resource used in one year.
Resources Used(JSS3)
Fraction of Usage in Total Resources*1(%): 0.01
Details
Please refer to System Configuration of JSS3 for the system configuration and major specifications of JSS3.
| System Name | Amount of Core Time(core x hours) | Fraction of Usage*2(%) |
|---|---|---|
| TOKI-SORA | 0.00 | 0.00 |
| TOKI-RURI | 0.00 | 0.00 |
| TOKI-TRURI | 0.00 | 0.00 |
| File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
|---|---|---|
| /home | 491.14 | 0.34 |
| /data | 9,908.68 | 0.17 |
| /ssd | 238.42 | 0.12 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 0.00 | 0.00 |
*1: Fraction of Usage in Total Resources: Weighted average of three resource types (Computing, File System, and Archiver).
*2: Fraction of Usage：Percentage of usage relative to each resource used in one year.
JAXA Supercomputer System Annual Report April 2020-March 2021