Contribution to the multi-machine pedestal scaling from the COMPASS tokamak

M. Berta M. Aftanas J. Varju M. Komm J. Havlicek D. Naydenkova M. Peterka P. Hacek O. Grover M. Imrišek J. Urban P. Vondráček E. Stefanikova O. Bogár J. Krbec K. Mitošinková M. Sos P. B. Snyder P. Bilková M. Hron P. Böhm R. Pánek V. Weinzettl J. Stöckel L. Frassinetti

Publication Name: Nuclear Fusion

Publication Date: 2017-04-06

Volume: 57

Issue: 5

Page Range: Unknown

Description:

First systematic measurements of pedestal structure during Ohmic and NBI-assisted Type I ELMy H-modes were performed on the COMPASS tokamak in two dedicated experimental campaigns during 2015 and 2016. By adjusting the NBI heating and a toroidal magnetic field, the electron pedestal temperature was increased from 200 eV up to 300 eV, which allowed reaching pedestal collisionality v∗ ped < 1 at q95 ∼3. COMPASS has approached conditions for the Identity experiment done at JET and DIII-D, complementing the range of scanned p∗ ped. The pedestal pressure was successfully reproduced by the EPED model. The dependence of pedestal pressure width on v∗ ped and βpol ped is discussed.

Open Access: Yes

DOI: 10.1088/1741-4326/aa6659

Authors - 25

M. Berta

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M. Aftanas

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J. Varju

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M. Komm

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J. Havlicek

25633536900

D. Naydenkova

26031087800

M. Peterka

36600986000

P. Hacek

53982955200

O. Grover

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M. Imrišek

55416317700

J. Urban

55571979100

P. Vondráček

55775664100

E. Stefanikova

56313778100

O. Bogár

56429709500

J. Krbec

56695066900

K. Mitošinková

57000390600

M. Sos

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P. B. Snyder

57203071099

P. Bilková

6507913287

M. Hron

6701340372

P. Böhm

7005031773

R. Pánek

7006809441

V. Weinzettl

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J. Stöckel

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L. Frassinetti

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