Minutes of the Nov 7, 2003 Tevatron Dept Meeting

1. shutdown progress: a) Bruce - Tev was sucessfully ramped to 1005 GeV
though we were forced to switch from A3 to A2 main bus PS (ripple issues);
radiography at B16-1 did not reveal big quad displacement wrt to dipoles
(that happened to be datalogging error; vacuum was good everywhere... till
minor accident at P2 line - which goes thru F0 Lambertson... recovering;
b) Dean - A0 sextupole aligned, power leads covered by plastic cage, ready
for power next week; c) Fritz - pbar ends cabling 100% done, electrical
offsets of several BPMs has to be understood together with TD experts; d)
Ron - A48 collimator was found 0.1" off horizontally, fixed; e) see
also recent J. Volk shutdown status report in the Tev Web page.

2. Pierre Bauer presented results of b2 snapback studies at TD which
concluded in several recommendations: a) backporch time duration has to be
stabilized;  b) number of ramp cycles after quench can be reduced to 1 (6
now) with 40 min at flat top; c) operational b2 snapback algorithm
(waveform) should be improved; d) there is no need in beamless precycle
after each sucessful store if the store is longer than 1 hour. Slow drift
of main dipole field at 980 GeV was found to be dB/B=1e-4 over 1/2 hr.

3. Vladimir presented one week B-sector HLS data (24 quad elevations
logged every minute) - there are slow drifts of about 10's to 100's
microns (depending on distance between quads), 20 micron
Earth tides over 720 m with 12 hour period.

4. Vaia summarized recent indications of the beta^* drift at IPs which
occured since about Feb'03 (from 37-38 to some 42-45 cm): a) sigma_zL of
luminous region is up 7-10% (=the quantity propto sqrt(beta^* sigma_z)
while bunch length sigma_z was about constant; b)  ratio of (Effective
emittance from Luminosity/effective emittance from Flying Wires) (=propto
beta^*/Hourglass) grown by 6% since June'03; c)  beta^* parameter of CDF
SVT off-line analysis grown by some 10-15%.

5. Vladimir informed about changes in the BD organization - formation of a
new Accelerator Integration Department - and what it means for us:
several scientists will join the Physics group of the Tev Dept, Jim Morgan
will become permanent "Run coordinator"= "operation
coordinator" whom Tev coordinators will need to contact with, etc.

6. Vladimir presented bi-monthly Tev progress report (see beams-doc-905),
he expects luminosity back to 40e30 sometime mid-Dec'03, and hopes we will
break 50e30 before Jan 8, 2004; 15 major FY'04 Tev projects listed.

Minutes recorded by V. Shiltsev, edited by R. Moore