2012 Fiscal Year Final Research Report
Research and Developments of fast switching device of millimeter wave for electron cyclotron current drive
| Project/Area Number |
22560818
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Nuclear fusion studies
|
|---|
| Research Institution | Ibaraki University |
|---|
Principal Investigator |
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
IMAI Tsuyoshi 筑波大学, 数理物質科学研究科, 教授 (80354637)
|
|---|
| Project Period (FY) |
2010 – 2012
|
| Keywords | トマカク / 電子サイクロトロン電流駆動 / 大電力ミリ波 / 高速スイッチ |
|---|
| Research Abstract |
A new type wideband diplexer as a fast switching device of high power millimeter wave has been developed for an electron cyclotron current driving system. A main purpose of fast switching is a stabilization of neoclassical tearing mode in tokamak plasmas. The short-slotted metal half mirror, which is one of the key components of a wideband diplexer is proposed. Two types of short-slotted metal half mirrors were designed and tested. One is periodic slot, and the other is non-periodic slot in a longitudinal direction. The switching operation of a mock-up diplexer with short-slotted metal half mirrors was verified at the two frequency bands about 137 GHz and about170 GHz at low power. Finally, the high power test (～150kW) of diplaxer was performed at the frequency of about 170 GHz. No significant damege by rf discharges were observed in our diplexer.
|
