Novel mono-static arrangement of the ASDEX Upgrade high field side reflectometers compatible with electron cyclotron resonance heating stray radiation

11 de julho de 2012

<jats:p>The ASDEX Upgrade frequency modulated continuous wave broadband reflectometer system uses a mono-static antenna configuration with in-vessel hog-horns and 3 dB directional couplers. The operation of the new electron cyclotron resonance heating (ECRH) launcher and the start of collective Thomson scattering experiments caused several events where the fragile dummy loads inside the high field side directional couplers were damaged, due to excessive power resulting from the ECRH stray fields. In this paper, we present a non-conventional application of the existing three-port directional coupler that hardens the system to the ECRH stray fields and at the same time generates the necessary reference signal. Electromagnetic simulations and laboratory tests were performed to validate the proposed solution and are compared with the in-vessel calibration tests.</jats:p>

Autores da comunidade :

• 

  A

  António Guilherme Pereira Ehrhardt Gonçalves Silva

  ist23059

  Afiliações e fontes

  IST > IPFN

  Instituto de Plasmas e Fusão Nuclear

  De: orcid

  ID: 164120817

VoR - Versão publicada

AIP Publishing

Review of Scientific Instruments

83

10

0034-6748

10.1063/1.4732804

eng - Inglês