1. Dept news: a) 7 weeks shutdown will start August 25, 2003; b) Tev
shutdown projects are subjects or internal reviews: A48 collimator
(took place last week, Ron summarized the review), alignment (Ray
summarized the mtg this week, he looks toward the review in June-
first half of July), vacuum and F0 liner to be reviewed in the next 2-3
weeks.

2. Jim Steimel has presented the new Tev BPM specs at the review this
week. Though the official results are not distrubuted yet, MChurch thinks
the case was presented well.

3. XiaoLong Zhang presented summary of 4 stores since after the
shutdown - luminosity was low (20-32)e30 because of reduced proton
intensity (6200-7300e9 vs 8200-9200e9 at LB before shutdown - reason is
in the Linac and larger emittances at injection; somewhat smaller pbar
intensity (shoot from smaller stacks); luminosity lifetime dropped to 5-7
hours (vs 10-12 before), mostly because of worse eff emittance and proton
lifetimes. To our surprise, it was found that p and pbar lifetime at 150
can be improved by reducing the helix size - demonstrated by Bruce in
store #2644. Vladimir mentioned that after isntallation of attenuators
on pbar FWs, pbar emittances dropped significantly (from 20 pi at LB 2
weeks ago to 10-15 pi).

4. Yuri and Aimin explored V and H apertures over about 1/3 of the ring
with local bumps. Orbit motion at C46 led to large tune excursions due to
strong sextupoles there. Yuri asked for another 8 hours to finish aperture
bumps (to find out aperture centers around the ring. MChurch questioned
use of LOSTP for that (alternative method - find the aperture limits by
observation of beam loss - is more precise but significantly slower).

5. Bob Webber and Warren Schappert developed some electronics and
installed Ecotech(?) card to process VA16 BPM signals and calculate
orbit postion as average over 16 turns with sampling rate of 10/7 x F_rf.
As the result, they were able to see (mostly proton) orbit motion to great
detail with accuracy (noise)  of about 10 microns (compare with LSB of 150
microns in current BPMs), the effect of intensity is small (<20 micron
difference between 1 and 36 p-bunches), effect of pbars on proton readings
is <50 microns. Q1(Andreas): what would be effect of 5 times larger number
of protons? A(MChurch): worst case 750 microns at 150 and 250 at 980 GeV,
can be subtracted in software; Q2(Jerry): can new BPMs work turn-by-turn?
A(Bob Webber): yes, with accuracy 40 micron/turn/bunch. See ACNET channels
Z:TPOS0 and 1 (VA16, HA17).

6. Alvin claims that SBDPIS and AIS are calibrated to 1% accuracy wrt
IBEAM - now these channels are the most believable for the bunch-by-bunch
intensities. DC beam at 150 can be clearly seen as difference
IBEAM-SBDTWG (the latter is new channel equal to SBDPIS+AIS). Some
systematic changes of ratio SBDTWG/IBEAM seen in the store (many hours
time scale) - of the scale of 1%, not yet understood.

7. Tanaji compared theory and observations of pbar bunch-by-bunch position
variations and found quite remarkable agreement. E.g., in store #1787, hor
variation has quite systematic droop of about 30 micron between A1 and A12
and has 3-train symmetry. As the SL error is as small as 1-2 microns, the
SL position data can be used to check beam-beam models with great detail.

8. Vladimir attempted to extract chromaticities of individual pbar bunches
from 1.7GHz Schottky spectra - by comparing widths of Q and 1-Q lines.
Strange (coherent?) lines in the spectra are majort source of the error.
At the beginning of #2502, fit error in H-spectra was about 0.4 units
rms, and 4 units in vert plane. The system can become extremely useful for
C_v,h diagnostics if i) Q and 1-Q lines will not be folded on each other
(that was probably the reason why C_h in #2502 was found to be 0-3 units
instead of expected 15-20); ii)  electronics modified and strange lines
are removed from the spectra; iii)  the system should be calibrated (e.g.
EoS studies with intentional known changes in C_v,h). Valery pointed out
that the method (C_v,h from Schottky) can be used only for
individual bunches because of significant bunch-to-bunch tune spread.