Rich Hawryluk, 4/4/97 2:54 AM -0500, Final TFTR Update April 4, 1997
Date: Fri, 4 Apr 1997 02:54:55 -0500 (EST)
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From: rhawryluk@pppl.gov (Rich Hawryluk)
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Subject: Final TFTR Update April 4, 1997
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Status: RO1

Status (April 4, 1997):
This will be the final TFTR Update for the last tokamak experiments on TFTR
were conducted last night going into this morning. The final shotoccurred at 1:50 am this morning.
This Update is dedicated to the outstanding team of scientists, engineers,technicians, administrators, and office and clerical staff who areresponsible for the successful operation of TFTR and the historic D-Texperiments. I want to express my gratitude and thanks to the following
for their contribution to the recent series of experiments on TFTR:
B. Allen, C. Ancher, F. Anderson, H. Anderson, J.W. Anderson, J. Anderson,M. Anderson, G. Ascione, D. Au, M. Awad, E. Baker, A. Bara, W. Barlow, D.
Barnes, G. Barnes, J. Bartolik, J. Bartzak, D. Bashore, S. Batha, J.
Bavlish, D. Bashore, F. Beane, M. Beer, M. Bell, R. Bell, J. Benchoff, J.
Bennett, J. Bennevich, J. Benson, D. Bergmann, B. Berlinger, S. Bernabei,R. Biache, J. Bialek, J. Bianco, M. Bitter, J. Bitzer, W. Blanchard, A.
Bleach, P. Bonanos, J. Bonfonti, R. Borusovic, J. Boscoe, A. Brooks, C.
Brunkhorst, D. Bumgardner, E. Breimann, N. Bretz, K. Brink, M. Brown, M.A.
Brown, R. Brown, T. Browning, C. Bunting, E. Bush, P. Buggs, M. Byrne, R.
Camp, R. Cancel, F. Cargill, R. Cargill, M. Carideo, H. Carnevale, R.
Carnevale, A. Carpe, T. Carroll, J. Carson, M. Casey, T. Cashel, K. Chase,
C. Cheng, G. Christianson, J. Chrzanowski, J. Chu, L. Ciebiera, D. Ciotti,
J. Citrolo, J. Clark, R. Clark, V. Clift, J. Collins, K. Collins, J.
Conover, R. Cook, S. Connell, A. Contino, J. Corl, M. Cropper, T. Cruser,C. Cummings, R. Cutler, D. Cylinder, G. Czechowicz, T. Czeizinger, G.
D'Amico, F. Dahlgren, D. Darrow, F. Daugert, A. Davis, S. Davis, W. Davis,D. DeBonis, J. DeLooper, A. DeMeo, R. Delany, W. Derry, J. Desandro, F.
DiBella, J. Dickinson, M. Diesso, M. DiMattia, J. Dolobacsm, J. Dong, L.
Dudek, J. Edwards, W. Edwards, R. Ellis, S. Elwood, P. Ernst, A. Ettore, M.
Ewashko, H.M. Fan, G. Feller, V. Finley, N. Fisch, W. Foraker, N. Fortune,
J. Franchino, J. Frangipani, E. Fredd, E. Fredrickson, G.Y. Fu, R. Fuchs,R. Gallagher, J. Garboski, V. Garzotto, D. Gayley, J. Gennuso, M. Gensamer,C. Gentile, L. Gereg, R. Gernhardt, J. Gething, J. Giarrusso, G. Gibilisco,T. Gibney, M. Gibson, J. Gilbert, C. Gillars, K. Gilton, J. Gorman, J.
Graham, L. Grisham, S. Green, T. Greenberg, N. Greenough, B. Grek, J.
Grouss, J. Gumbas, L. Guttadora, T.S. Hahm, E. Hall, G. Hammett, L. Harmon,G. Hart, R. Hatcher, R. Hawes, R. Herskowitz, K. Hill, S. Hill, J. Hirsch,C. Hirschman, T. Holoman, R. Holt, S. Homer, D. Horner, R. Horner, J.
Hosea, R. Hutchinson, J. Hynes, J. Ignas, D. Ignat, A. Ilic, M. Iseicz, S.
Iverson, W. Jackson, S. Jardin, D. Jassby, R. Jeanes, F. Jobes, D. Johnson,
L. Jones, S. Jurczynski, R. Kaita, M. Kalish, J. Kamperschroer, J.
Kazywaluk, E. Kearns, S. Kemp, M. Keller, M. Kijek, M. King, C. Kircher, J.
Kish, P. Kivler, R. Koon, T. Kozub, D. Krause, R. Kress, M. Krysa, J.
Krzywulak, L.P. Ku, H. Kugel, D. Kungl, R. Lamb, G. Labik, J. Langford, S.
Printed for Dale Meade <dmeade>1Rich Hawryluk, 4/4/97 2:54 AM -0500, Final TFTR Update April 4, 1997
Langish, S. Larson, P. LaRue, D. Lawson, B. Leblanc, D. LeBon, L. Leckie,
J. Lehner, G. Lemunyon, D. Lesser, J. Levine, F. Levinton, M. Lewis, K.
Lincoln, C. Lindenmuth, K. Link, D. Loesser, G. Loh, D. Long, B. Longmuir,
J. Luckie, C. Ludescher, J. Lumberger, E. McBride, M. McCarthy, B.
McCormack, D. McCune, R. McDonough, J. McEnerney, C. McFarlane, T.
McGeachen, J. McGuire, A. McKee, M. McMullen, R. Majeski, F. Malinowski, J.
Malsbury, J. Manickam, D. Mansfield, R. Marsala, A. Martin, J. Mazzela, E.
Mazzucato, R. Meagher, S. Medley, T. Meighan, R. Mika, D. Miller, J.
Montague, A. Morgado, L. Morris, J. Mount, N. Morse, D. Mueller, S.
Murphy-LaMarche, P. Murray, R. Myslinski, A. Nagy, R. Nazikian, H. Neilson,R. Neindorff, J. Nelson, J. Nemeth, D. Neuman, P. Neuman, C. Neumeyer, L.
Nixon, P. Novak, C. O'Brien, D. O'Neill, T. O'Connor, G. Ochs, M. Oldaker,G. Oliaro, M. Ono, J. Orlopp, K. Ossmann, R. Palladino, H. Park, W. Park,R. Parsells, A. Patterson, S. Patterson, S. Paul, G. Pearson, E. Perry, R.
Persing, R. Persons, C.K. Phillips, F. Polom, N. Pomphrey, S. Pontani, R.
Popp, C. Potensky, R. Pressburger, G. Prosser, T. Provost, M. Pueyo, D.
Pulyer, S. Pycik, R. Pysher, M. Quigley, S. Raftopoulos, L. Raics, R.
Raimond, S. Ramakrishnan, A. Ramsey, L. Randerson, R. Raucci, R. Reed, W.
Reese, D. Reeves, R. Reny, G. Rewoldt, K. Rhoades, L. Rich, D. Richardson,
W. Richardson, E. Riscoe, P. Robertson, E. Rogers, J. Rogers, L. Roquemore,P. Roney, G. Rossi, T. Ruffin, K. Rule, J. Rushinski, C. Salmon, C.
Saville, J. Savino, G. Schilling, G. Schmidt, S. Schoen, P. Schwarz, C.
Scimeca, L. Scimeca, J. Scott, J. Semler, T. Senko, D. Shaltis, P. Shangle,G. Sheffield, R. Sheneman, P. Sichta, J. Siegel, K. Silber, F. Simmonds, C.
Sims, T. Sines, T. Singer, C. Skinner, W. Slavin, C. Smith, R. Smith, V.
Smith, R. Snead, B. Snyder, M. Snyder, B. Sobel, J. Sorenson, E. Spears, J.
Spitzer, J. Stacy, W. Stanton, W. Stark, T. Steer, A. Stevens, G. Stevens,T. Stevenson, G. Stines, L. Stone, J. Strachan, B. Stratton, R. Strykowsky,C. Such, R. Such, L. Sutton, E. Synakowski, R. Szaro, C. Szathmary, W.
Tang, G. Taylor, R. Templon, T. Terpstra, N. Thomas, M. Thompson, C.
Tilson, K. Tindall, D. Tomalin, M. Tompkins, H. Towner, R. Tucker, S.
Tureikas, A. Vanisko, R. Vankirk, J. Vannozzi, T. Vavricka, C. Vetri, M.
Vocaturo, M. Viola, S. Vinson, M. Vocaturo, S. von Goeler, A. von Halle, D.
Vorp, W. Walker, J. Walsh, T. Ward, S. Warkala, T. Walters, F. Wasylenko,R. Weisel, J. Wertenbaker, W. Weyman, A. White, D. White, R. White, R.
Whitley, M. Widdism, M. Wieczorek, R. Wieland, M. Williams, S. Williams, J.
Wills, J.R. Wilson, E. Winkler, J. Winston, J. Wioncek, A. Wise, L. Wohar,
K.L. Wong, R. Woolley, L. Yager, R. Yager, K. Young, L. Zakharov, N. Zakir,
I. Zatz, G. Zimmer, W. Zimmer, S. Zweben

2During the recent TFTR experiments, we have had the pleasure of working
with many scientists and engineers from other laboratories and industry whomade important contributions to our Program:
Argonne National Laboratory:
Jeffrey Brooks
Association Euratom_CEA Cadarache France
Gui T. Hoang
Colorado School of Mines:
Ed CecilColumbia U.:
Mike Mauel
Printed for Dale Meade <dmeade>2Rich Hawryluk, 4/4/97 2:54 AM -0500, Final TFTR Update April 4, 1997
Jerry Navratil
Franco Paoletti
Steve Sabbagh

3Ecole Royal Militaire Brussels
Jeff Ongena
Fusion Physics & Technology:
Steve Batha
Fred Levinton
General Atomics:
Ray Fisher
Cary Forrest
Paul Parks
Ted Strait
INEL:
Jon Cormack
Kathy McCarthy
ITER Joint Central TeamMarshall Rosenbluth
Institute of Fusion Studies:
Herb Berk
Boris BreizmannBill Dorland
Institute of Plasma Phisics Academia Sinica (ASIPP)
Jiangang Li
Ioffe Institute (Russia):
Michael Petrov
Japan Atomic Energy Research Institute Naka Japan
Kiyataka Hamamatsu
Mitsuru Kikuchi
Yuzuru Neyatani
JET Joint Undertaking:
Bernard Balet
Geoff Cottrell
Mike Loughlin
Paul Thomas
LANL:
Cris Barnes
R. Causey
Ricardo Maqueda
Kurt Schoenberg
Glen Wurden
Lehigh University:
Arnold Kritz

Printed for Dale Meade <dmeade>3Rich Hawryluk, 4/4/97 2:54 AM -0500, Final TFTR Update April 4, 1997
LLNL:
R.H. Bulmer
Bick HooperBill Nevins
L.D. Pearlstein

4Lodestar:
Dick Aamodt
D. D'Ippolito
Jim Myra
Mission Research:
David SmitheMIT:
Daren Ernst
Jay KesnerJohn Machuzak
Earl Marmar
Dieter Sigmar
Yuichi Takase
National Institute of Fusion Science (Japan):
Yoshio Nagayama
Masaki Osakabe
Mamiko Sasao
New York University:
C.S. Chang
Northrup Grumman:
Mike Hughes
Mike Phillips
ORNL:
Tim Bigelow:
Charles Bush:Greg Hanson
John Hogan
Wayne Houlberg
Stan Milora
Peter Mioduszewski
Russian Research Center (Kurchatov):
Peter Savruhkin
Sandia National Laboratory:
Mike Ulrickson
TRINITI (Russia):
A. BelovNicolai GorolenkovYuri Kazchuk
Anatoli Krasilnikov
Sergei Mirnov
Igor Semenov
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5

UKAEA Government Division Culham:
Richard Dendy
Tim Hender
William Morris
University of California at Davis
Neville Luhmann
DoE Fellow:
Emil Ruskov
University of California at Los Angeles:
Mohamed Abdou
Anil Kumar
University of California at San Diego:
Charles Baker
Pat Diamond:
Yoshi Hirooka
Stan Luckhardt
U. Illinois:David Ruzic
U. Maryland:
Jim Drake:
U. Texas:
Perry Phillips
U. Texas at AustinJames Van Dam
U. Wisconsin:
Jim Callen:
Hal Evenson
Ray Fonck
Noah Herschkowitz
Tom Intrator
JiSoo Kim
Michael Kissick
George McKee
Jim Scharer

I would also like to acknowledge my gratitude to Harold Furth for bringing
TFTR to PPPL and to Ron Davidson and Dale Meade for their support of theD-T experiments. Without the leadership of Harold, Ron and Dale we could
not have succeeded.
This day was devoted to completing the calibration of diagnostics, several
experimental proposals and performing an integrated operations experiment.

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6

Several discharges for the MSE diagnostic were taken for calibration
purposes. These were mainly co-injection or counter injection shots toproduce a large amount of Er. This will be used for cross calibration with
the MSE-Er channels.
With high power neutral beam injection in reverse shear plasmas,
transitions to the Enhanced Reverse Shear (ERS regime) are often
characterized rapid rises in the central electron density . Evidence isstrong that these "delta-n" transitions are formed and sustained by ExB
shearing of turbulence. However, while such strong excursions in thedensity are not found below a power threshold, transitions to highconfinement with somewhat different signatures are observed well after theonset of neutral beam injection. These "delta-T" transitions arecharacterized by a strong, rapid broadening of the ion temperature, and amodest increase in peaking of the electron density. These transitions weredocumented with the carbon poloidal rotation diagnostic to see if, likedelta-n transitions, the paradigm of ExB shear suppression is connectedwith the bifurcation process. Preliminary analysis indicates that large
increases in poloidal rotation are not seen with the delta-T transitions,in marked contrast to the delta-n transitions. The ExB shearing rate
inferred from these measurements will be compared to predicted growth ratesof the dominant instabilities to elucidate the similarities and differences
between these two types of transitions.
The integration experiment aimed to combine with high-current supershotsand high-li plasmas in D-T with the radiating mantle technique forcontrolling the power flux to the limiter. After a standard limiter
conditioning campaign using both lithium pellets and the DOLLOP apparatus,
a 2.65 MA, 5.6T supershot was taken with krypton injection during theneutral beam pulse. The peak NB power was 33 MW and the total NB pulse
length 2.0s. Good confinement was initially achieved but it appeared thatthe amount of krypton was inadequate to prevent a severe limiter influx anda loss of confinement. This shot achieved a peak DT fusion power of 6.5 MW
and a total DT yield of 7.1 MJ, the second largest achieved on TFTR. Aftera brief recovery campaign, the high li shot was attempted. With 32 MW ofDT NBI this shot reached a peak fusion power of 7.8 MW (one of the highest
performance high -li shots). This shot also suffered from a limiter influx
after 0.3 s of heating. The lack of limiter conditioning was most likely
due to the extensive L-mode campaign earlier in the week. Nevertheless,these experiments provided further information about the control of highperformance discharges using the radiative mantle technique.
Even on the last day of operations, the availability and performance of allsystems was exceptional with nearly all operating at and above design
parameters. This is a tribute to the skill and hard work of the men andwomen working on TFTR.
Future Plans
No further tokamak experiments are planned on TFTR. Activities as part ofthe shutdown of the facility will begin today.
R. J. Hawryluk
609-243-3306
Printed for Dale Meade <dmeade>6

Rich Hawryluk, 4/4/97 2:54 AM -0500, Final TFTR Update April 4, 1997
e-mail rhawryluk@pppl.gov7_________________________________________________________________________
R. J. Hawryluk
rhawryluk@pppl.gov
PPPL - LOB 325
Phone: (609) 243-3306
Fax: (609) 243-3248
You can visit the home page of the Princeton Plasma Physics Laboratory
at http://www.pppl.gov

Printed for Dale Meade <dmeade>7