A superconducting quadrupole magnet with an aperture of 50 millimeters and a gradient of about 190 teslas per meter at 6700 amperes has been designed and tested by the magnet systems division of SSCL. Magnets with this cross section and various magnetic lengths ranging from 4.0 m to about 15.5 m will be employed in the interaction regions and the utility regions of the Collider.
Two short (1.2 meters) model magnet cold masses were built, and their quench performance was found to be satisfactory for use in the collider. The magnets had 3 training quenches each before a plateau current in excess of 8600 A was reached in liquid helium (4.3K). The first model, QSE101, had its first training quench at near 7170 A and the second model, QSE102, had its first training quench at over 7600 A, both well above the operating current. The training behavior is seen to be associated with the m
agnet ends. The magnets also exhibited satisfactory retraining behavior after thermal cycles, with at most one training quench.
Field quality and further improvement of quench behavior in the quadrupoles are being studied now. A third model, QSE103, is being built now and fabrication of a second lot of 3 magnets will begin in a few months. A 15-m long quadrupole in a cryostat and the associated tooling are being designed. This full-size magnet, QCE101, will be assembled during the second half of FY 93 and will lead to the first interaction region quadrupole prototype.
DETECTOR NEWS
There is joy in SDCville tonight; their detector has passed its DOE baseline review with flying colors. About 50 experts spent a week in late October peering into every corner of the SDC design, cost, schedule, and management, without turning up any serious problems. Now the collaboration can get on with the job of building the half-billion dollar detector. Incidentally, DOE suggested that the cost was apt to come in a bit lower than SDC's estimate, rather than higher, as is often the finding of such re
views.
One down, one to go: GEM is now preparing its technical design report, to undergo the same thorough review beginning with a detailed SSCL/PAC inspection in April 1993, followed by a PAC review and recommendation in July, and then the same kind of DOE scrutiny, probably next fall. Meanwhile, if GEM looks good at the December PAC meeting, its large superconducting magnet could be ordered in the spring.
COMMENTS ON SSC NEWS
A number of readers responded to our request in the last issue for comments on this newsletter. Many were satisfied with the content and the frequency, but several suggested that shorter and more frequent issues would be better, while others wanted more details on their favorite subjects, such as magnets or detectors. One reader suggested quick bulletins on special events, and another wanted shorter items within each issue, saying he would read more of them "if only they were in more manageable packages.
" Some asked for more information about the Laboratory facilities and staff, "so that we can watch it grow," and one person asked for more on the status of the project, including its budget and schedule, and its impact on environment, education, and business, as well as an email-accessible list of commonly asked questions and answers and other important facts about the SSC.
More frequent and shorter issues seems like a good idea, and you will note that this issue is a little shorter--and much more frequent! The other suggestions sound good, too. I hope future issues will cover the subjects that interest you, and that you won't hesitate to ask for what you want. Meanwhile, this issue is ...
BAGGETT'S SWAN SONG
I have joined the physics division to work on GEM, and this will be my last issue of SSC NEWS. A new editor will be appointed soon, I hope, and the newsletter will continue. It's been a pleasure doing business with you. -- Neil Baggett
(fewer) DATES TO REMEMBER
November 16-17B Physics Studies:
Collider Experiment with Central Rapidity Coverage
Fermilab(BPHYSICS@SSCVX1)
November 19-21Scientific Policy Committee meeting
SSCL, Dallas
December 2-4Program Advisory Committee meeting
SSCL, Dallas
March 29-31, 1993SSC Physics Symposium
University of Wisconsin, Madison (LDOLAN@WISCPHEN)
May 5-8, 1993International Industrial Symposium on the Super Collider (IISSC)
San Francisco, California(P. Patterson: 619-490-0164)
SSCLAB CALENDAR
To see a longer list of HEP events, including SSC detector collaboration meetings, log onto SSCVX1 as SSCLAB (no password is required) and select calendar from the menu. Send any comments or items for the calendar to USERSOFFICE@SSCVX1.
HOW TO SUBSCRIBE TO SSC NEWS
Send a one-line mail message to: LISTSERV@UTARLVM1 (that's LISTSERV, not SSCNEWS). The full Internet address is: LISTSERV@UTARLVM1.uta.edu.
The message should be similar to the following example:
EXAMPLE:SUB SSCNEWS Max Planck
(Insert your own name, using Initial Capital letters)
LISTSERV will pick up your email address from your message. To unsubscribe, send SIGNOFF SSCNEWS. If your email address changes, please sign off from the old account and then subscribe from the new account. Send any suggestions or questions to Neil Baggett: BAGGETT@SSCVX1. No, wait, I'm outta here. Send them to Raph Kasper: KASPER@SSCVX1. He wants to hear from you.
