Thursday, February 19|
Noon Wellness Works – Brown Bag Seminar - 1 West
Speaker: M. Kinzler (Registered Nutritionist)
Title: Healthy Heart Eating
2:30 p.m. Theoretical Physics Seminar - Curia II
Speaker: G. Zanderighi, Fermilab
Title: Automated Resummation of Final State Observables in QCD
3:30 p.m. DIRECTOR'S COFFEE BREAK - 2nd Flr X-Over
THERE WILL BE NO ACCELERATOR PHYSICS AND TECHNOLOGY
Friday, February 20
3:30 p.m. Wine & Cheese - 2nd Flr X-Over
4:00 p.m. Joint Experimental Theoretical Physics Seminar - 1 West
Speaker: R. Scharenberg, Purdue University
Title: Signatures of the Quark-Gluon to Hadron Thermal Phase
Transition in pbar-p Collisions at 1.8 TeV
Thursday, February 19|
Corn and green chili bisque
Shepherd's pie $3.50
Lean roast beef piled high w/pepperjack and a tangy horseradish mayo $4.75
Smoked ham and peas tossed w/penne pasta in a parmesean cream $3.50
1/2 pound burger topped w/melted pepperjack, salsa and a green chili mayo served w/soup or fries $4.75
Eurest Dining Center Weekly Menu
RF Structures Pass the Test|
Only the FXB006 (red circle) achieves an average gradient of
65 MV/m with a breakdown rate less than 0.1 per hour. (Click on image for larger version.)|
The results are in. One of the latest Fermilab RF structures sent to SLAC,
the site of the Next Linear Collider Test Accelerator (NLCTA) facility,
has passed the test. The structure, cryptically titled FXB006
(for Fermilab X-band structure: series B, number 6) transfers energy
from a power source to a beam of electrons. The design specifications
for these RF structures for the Next Linear Collider are an unloaded
accelerating gradient of 65 MV/m and less than 0.1 breakdowns/hr.
The structures are being produced at Fermilab in collaboration
with KEK and SLAC. "FXB006 is the first structure ever produced
that has simultaneously met the 65 MV per meter and less than 0.1
breakdowns per hour
requirements," said Shekhar Mishra of the Technical Division.
"The breakdown rate of this structure after more than 200 hours
of processing is 0.05 per hour." Its brother, FXB007, follows closely
behind with a breakdown rate of 0.16 per hour.
A newer version of the RF structure, designated FXC,
contains slotted disks and is currently undergoing testing at the NLCTA.
|FXB006 being tested at SLAC.|
Two Mute Swans Make a Stop at Fermilab|
|Two mute swans spent
a couple of days in the cooling water ponds of the Main Injector earlier
this week. (Click on image for larger version.)|
On Tuesday a group of ornithology and biology students from NIU
DeKalb was treated to a surprise upon their visit to Fermilab:
two mute swans putting on a mating display in the Main Injector ponds.
According to Fermilab's Peter Kasper, who keeps an online journal
of Fermilab bird sightings, the copulating swans were first spotted
at that location on Sunday. As of Wednesday, they were gone. The
birds were probably just passing through, "looking for a good place
to set up home," Kasper said. Mute swans are spotted at Fermilab
only a few times a year. Kasper noted that his tour group was
Recent Bird Sightings at Fermilab
|Mute swans are spotted at Fermilab only a few times a year. (Click on image for larger version.)||
B Stars on Ice|
|The data points (asterisks)
show B+pi- (right-sign) and the red curve
shows B+pi+ (wrong-sign) combinations.
The peak (green curve) at 0.426 GeV/c2 corresponds to
the four L=1 B**0
states. (Click on image for larger version.)|
The study of sub-atomic particles containing a bottom quark helps us
understand how all fundamental particles interact. The heavy
b-quark paired with an anti down-quark can form a number of
different particles -- including four combinations dubbed the B** mesons. These four
separate states occur because the two quarks are in different
quantum states (much like a pair of ice skaters orbiting one another
unique velocities or intervals of separation).
Brigitte Vachon is|
a Fermilab Postdoc
has been working
on the central tracking
trigger for DZero.
The DZero experiment has observed the production of these B** states by
measuring the stable particles produced when they decay. All four B**
states contribute to the bump shown as a green line in the figure above.
Amazingly B mesons can oscillate between matter and antimatter states.
The study of B** mesons and their properties, although interesting
enough by itself, has implications for understanding B oscillations.
Studying this can help us understand the dominance of matter in the
Matthew Doidge is a|
graduate student at
UK. He is investigating
the characteristics of
the B** system.
The study of these heavy excited B-mesons can only occur at the
Tevatron, as experiments at Stanford and KEK (in Japan) do not operate
at sufficiently high enough energies to produce such particles. The
prospects are bright for these studies of heavy quarks to give us clues
as to the composition of the universe.
Result of the Week Archive
February 16 - February 18|
- During this time period Operations established one store. That
store, along with one that already existed, provided approximately 41 hours
and 13 minutes of luminosity to the experiments.
- A 480V breaker in the East Booster Gallery tripped off.
- Experts from the Tevatron, Main Injector, Recycler, Antiproton
Source, Booster, Linac, and Switchyard conducted machines studies.
View the current accelerator update
View the Tevatron Luminosity Charts
Brown Bag Seminar Today|
Wellness Works presents a Brown Bag Seminar on
Thursday, February 19, from noon to 1:00 p.m. in One West
entitled Nutrition for a Healthy Heart.
The presenter is Michele Kinzler, Registered Nutritionist
with Central Dupage Hospital.
New Book Purchase Suggestion Lists
New Book purchase suggestion lists for the week of February 17
are now available online.
These include Majors book lists in four subject areas.
There is also an Amazon suggestion list in the form of a shopping cart,
viewable by entering the password "library."
Please take the time to review the list of books in your area of
interest. Please send your book purchase recommendations,
either from these lists, or from other sources to Sandra Lee.