A schematic graphic display of the P150 and A150 line magnet layout.
The settings for the magnets and trim dipoles can be found on page I65, 150 P/EXT, subpage <14>.
Sign convention: A positive current in the P150 horizontal dipole correctors
bends protons traveling from the MI to the Tev toward the Tevatron's radial outside.
(Tevatron Electronic Log 1 Entry #273.) Note that this is the OPPOSITE convention of the
horizontal dipole correctors in the Tevatron. A positive current in the P150 vertical
dipole correctors bends protons upwards. This is the same convention as the Tevatron
vertical dipole correctors.
For documention of P150 line trajectories during the middle of the Fixed Target
Run see Tev
Electronic Log 1, Entry #586.
This has a complete set of orbits including the P150 horizontal
and vertical
positions and magnet settings,
the Main Injector last turn orbits, the Tevatron horizontal
and vertical
flash flames and horizontal
and vertical
display frames.
The display frames were taken just after injection so the E and F extraction phase bumps were off. These settings and position may not be the ideal position for the Collider Run but they may be helpful when first starting up the Tevatron.
Note: The main point to notice in these files is that we ran with the vertical
position at the end of the P150 line (VP714B = +12.7 mm) and the vertical position of the
Tevatron orbit (VPE49 = 0.0, VPF11 = 7.03) at the Lambertson significantly higher
than zero. This was consistent with aperture scans done May 18-19, 1999.
The horizontal position of the F0 lambertsons can be moved. The stepper motor devices are T:LAMF0U and T:LAMF0D. When these devices are at 0 mils the center of the Lambertson septum is 0.5 inches radial outward from the Tevatron centerline. The thickness of the septum at its thinnest point is 5 mm.
MAD calculations of 4-bumps on the injection lattice at the Lambertsons are listed
below.
These are the HPOS, HANG, VPOS, and VANG bumps used in C49 in the Proton Injection
sequence.
They are also on the T37 parameter page - INJECT - <1> and <2>.
HPOS (A +1 mm radial outward bump):
HDE46 -0.01342 mrad.
HDE49 +0.000562 mrad
HDF11 -0.01134 mrad
HDF13 -0.008865 mrad
HANG (A +1 mrad angle bump centered at the middle of the Lambertsons. At the Lambertson
the orbit moves radial outward in the proton direction.)
HDE46 +0.5779 mrad
HDE49 -0.9173 mrad
HDF11 +1.318 mrad
HDF13 -0.2573 mrad
VPOS (A +1 mm vertically upward bump):
VDE47 +0.009647 mrad
VDE49 +0.007961 mrad
VDF11 -0.0005562 mrad
VDF14 +0.01327 mrad
VANG (A +1 mrad angle bump centered at the middle of the Lambertsons. At the Lambertson
the orbit moves upward in the proton direction.)
VDE47 -0.4183 mrad
VDE49 +0.7818 mrad
VDF11 -0.7517 mrad
VDF14: +0.2682 mrad
For plots of the bumps see inj_bumps.pdf
With F17 Kicker giving a +0.320 mrad kick (T:F17K1 = 2.65 kV) and the closed orbit at the
Tev center a MAD calculation of the injection orbit gives the following positions:
MTEV60 (the middle of the Lambertsons) position = +20.1 mm, angle = 3 urad.
HPF11 +14.6 mm
HPF13 -15.0 mm
HPF15 -24.7 mm
HPF17 -3.65 mm
A fixed target FLASH - DISPLAY orbit (without the phase bumps) has the difference orbit
as
HPF11 +15.8 mm
HPF13 -15.0 mm
HPF15 -25.7 mm
HPF17 -4.1 mm
which agrees well with the calculated value.
For notes on the injection kicker timing see kicker timing notes.
minor rev. 31-May-02. EM
