1. Engineering Aspects of Microwave
XXVI International Symposium on Discharges and Electrical Insulation in Vacuum ISDEIV 2014
Engineering Aspects of Microwave
Diagnostic in ITER
K. M. Patel, V. S. Udintsev, G. Vayakis, T. Giacomin, D. Johnson, Ph. Maquet, H.K.B. Pandya, C. Penot, M. Portales, M. Proust, J. W. Oosterbeek, V. Vershkov, M. J. Walsh
Kaushal Patel
Institute for Plasma Research, Nr. Indira Bridge, Bhat Village, Gandhinagar
Category : C4
Paper No: 247
2 October 2014, Session: 7
The views and opinions expressed herein do not necessarily reflect those of the ITER Organization

2. ISDEIV 2014 KAUSHAL PATEL ISDEIV 2014 ORAL C4 247
Outline
Introduction
Environment for ITER Diagnostic
Microwave Diagnostic in ITER: Overview
Microwave diagnostic in ITER
- ECE diagnostic in Port Plug
- The design of inboard (HFS) waveguides
- Front-end of LFS Reflectometry
Summary and Outlook
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3. ITER is twice as large as our largest existing experiments
M. Walsh et al., SOFE, 2011
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4. Environment of ITER Diagnostic
Relative to existing machines, on ITER some of the diagnostic components will be subject to (relative to JET)
High neutron ~ 3 x 1018 m-2s-1 and gamma fluxes (up to x 10)
Neutron heating 1 MW/m3 (very high)
High electron temperatures (up to x 3 to 5)
Plasma Current: 15 MA (up to x 3 to 5)
Long pulse lengths: 3000 sec (up to x 100)
High neutron fluence: 0.3 MW y m-2 in active phase (> 105 ! )
For Instrumentation and Controls relevant are:
High magnetic field and radiation levels in port cell
Long cables to diagnostic building
Other challenges: Materials, Integration in the harsh environment etc.
M. Walsh et al., SOFE, 2011
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5. Microwave Diagnostics in ITER: Overview
ECE; Eq. Port 09 (US/IN)
CTS (LFS); Eq. Port 12 (EU)
HFS Refl., Upper Ports 8, 9, 17 (RF)
Plasma. Pos. Refl., Upper Ports 1, 14, EqP 10 (EU)
LFS Refl.,
Eq. Port 11 (US)
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6. ECE Diagnostic in Port Plug
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7. ISDEIV 2014 KAUSHAL PATEL ISDEIV 2014 ORAL C4 247
HFS Reflectometry
UPs# 08, 09
UP# 17
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8. HFS Reflectometry – Block Diagram
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9. HFS Reflectometry: Portcell & Gallery
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10. The design of inboard (HFS) waveguides utline
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11. Low Field Side Reflectometry
Eq#11
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12. Front-end of the LFS Reflectometry
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13. ISDEIV 2014 KAUSHAL PATEL ISDEIV 2014 ORAL C4 247
Summary & Outlook
Microwave diagnostic at ITER are in preliminary design phase. To check integrity with other diagnostic system within vacuum vessel, port plug and port cell, design review of microwave diagnostic is ongoing. In vessel components of microwave diagnostics are design & protected in such a way it function in ITER environment with least possible maintenance.
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14. ISDEIV 2014 KAUSHAL PATEL ISDEIV 2014 ORAL C4 247
Thank You
The views and opinions expressed herein do not necessarily reflect those of the ITER Organization
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