PERSISTENT SURVEILLANCE FORPIPELINE PROTECTION AND THREAT INTERDICTION

DIII-D relevant work

Presented byR.L. BoivinbyR. Boivin

April 2006

New Counter-MSE system is being added to the DIII-D MSE system

• 8 New Core

– (1.675 ≤ R ≤ 2.00 m)• 16 New Edge

– (2.00 ≤ R ≤ 2.28 m)•All operational in FY06

• Improvements: R ~ factor of 3 (Er) ~ factor 2 in core, factor of 5–6 in edge

(Bz) ~ about 20–30%

24 Channels Viewing 210 Beam will Provide Improved EFIT

Apparatus for measuring polarization and reflectivity of MSE related components- (LLNL Internal funding with

GA)

Polarization rotation by mirror

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Incidence angle (degree)

Polarization angle rotation (degree)

Study on metal Mirrors in lab

In-situ mirror polarization monitor inside DIII-D - over many (or few discharges)

Thor Lock-In 500 Hz Goniometer

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10000 20000 30000 40000

Encoder Counts

Lock in (NEGATIVE)

1 degree

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Measurement of metal and dielectric mirror properties

Can resolve 1 degree changes

New Technique: |B|and B/BT from Stark Split D Emission

• |B| gives information on internal field structure

• B/BT can be obtained from the 1 and 3 Stark components

• Expected sensitivity:

– |B| ~ 0.07 T (0.004BT)

– B/BT ~0.01 (2%)

•Pitch angle ~0.6˚• Spatial resolution ~1.5–5.0 cm• Student thesis work (N. Pablant)• ITER relevant diagnostic- can itComplement MSE?

330˚

Counter-CER: Add Eight New Tangential Views, Looking at Counter Beam Line- Better rotation characterization

• Comparing views looking at co vs. counter beams:– Difference of two views

~2x cross-section correction

HUGE!• View 210 beams from 165R0

– Essentially duplicate central tangential system viewing 30LT from 315T0 and 345R0

• New views will couple to new Sarnoff CCD detectors

Relocated ECE antenna brings in better resolution and time response

• ECE radiometer upgrade– ∆z, ∆ø determined by

antenna pattern, ∆R by IF bandwidth

– Shown is typical radial coverage at BT = 2.0 T

– 400 MHz filters already installed for chs 1-16

• Change will improve our resolution of small amplitude modes and related activity

University of Maryland

The ECE upgrade allows new insights into Energetic Particles physics

Crosspower ECE8 & ECE9

Crosspower ECE14 & ECE15

The ECE measurements give radial profiles of the TAEs and RSAEs. The RSAEs show strong localization near q-min.

TAEs

RSAEs

This is very important for Energetic Particles Study in ITER!

The addition of Quartz micro-balance in lower divertor will help in diagnosing Carbon migration

• Measure material deposition (e.g. Carbon) in real-time

• 2 locations behind the 45deg tile (newly contoured)

• Electronics in vertical port (outside vacuum)

• Critical diagnostic for ITER related R&D

• Help in characterizing deposition (including mirrors)

Boundary

A prototype tangential interferometer and polarimeter is being installed

• Start at CO2 wavelength

• Use 1 turning mirror and 1 retroreflector– Very similar to ITER geometry

– Look at coatings, calibration issues and others.

– More chords are possible

Small but measurable rotation are expected n DIII-D

• Small rotation are expected at CO2 wavelength (and typical DIII-D conditions (2.1T)

• Digital system is expected to resolve those rotations

The new divertor shelf brings in new capabilities for optical and spectroscopic diagnostics

• Filterscope view rearranged from top, MDS spectrometer from below

• New shelf gives new access to inner leg and private flux region

• Will be a component of measuring flows in the divertor region

• Will take advantage of the newly contoured tiles

• New telescope will help develop (ITER) relevant diagnostics in divertor area

The scanning probes have all been upgraded

• DiMES– Modifications to hydraulics (extended height)

– Continue mirror testing (ITER)

– Porous Plug experiments• Midplane scanning probe

– Addition of airlock– Becomes MiMES – Mirror testing can also be done at the midplane

• Strongly continue the support of mirror testing– New mitigation techniques?