**[3) C0 Lambertson replacement]{.underline}**

[Potential impact:]{.underline} Will allow helix to be opened \~20-30%
at 150 GeV by increasing vertical beam aperture at this location. Expect
lifetime to get better for both beams. Increase of the horizontal helix
now is not possible because of need of additional separators around C0.

[Status:]{.underline} corresponding beam studies have been performed and
the aperture affect quantified; the replacement project is in planning
stage.

[Plan of action:]{.underline} See
<http://home.fnal.gov/~peterg/c0_lambertson_replacement>

Replace 3 Abort Lambertson magnets by 4 FMI dipoles -- both run in
series w Tevatron bus

however, FMI installation needs active programmable shunt in B4 service
building

> with cables to B49. This shunt (and spares) is being developed by
> BD/EE dept.
>
> shunt supply to be controlled with a low-ß quad controller
>
> Pre-shutdown: TD remove/replace FMI beam pipes, BD add Recycler heater
> tape for bakeout
>
> Disconnect and remove 3 Abort Lambertson magnets and stands
>
> Remove B48 Abort Kicker Magnets and replace with bake-able vacuum pipe

Remove Lambertson catwalk in C0 Exp Hall and false floor structure in
Tevatron tunnel

Replace catwalk and false floor with 28 K-blocks, 34 C-blocks and steel
plate

Thru C0 shield door, install 4 FMI dipoles (3\*6m + 1\*4m) with heater
tapes and new stands

Modify water cooled Tevatron bus between B49 lead box and crossover to
bypass to C11

Modify LCW manifolding for FMI dipoles

New vacuum pipes needed (replace B48 kickers), B49 TAB-FMI, FMI-BPM at
C-magnets

Hookup and commission vacuum, power, water, instrumentation, active
shunt

[Person in charge:]{.underline} **P. Garbincius**

[Resources required:]{.underline}

[Schedule:]{.underline} To be implemented in January 2003 shutdown

[Needs:]{.underline} This does not include Fermilab manpower costs:

[Costs:]{.underline} FY03 costs FY02 costs

Shunt/controllers \_\_\_\_ (pretty much already obligated)

Shunt cables/installed \$ 10 K

Magnet Stands fab \_\_\_\_ (already obligated vendor & FNAL shop)

TD costs for FMI tubes \$ 2 K

> Misc. Mechanical items \$ 30 K (beam pipe, couplers, copper flags,
> bus)

Contingency (50% above +) \$ 21 K

Rental of 30 Ton fork lift \$ 5 K (quotation from vendor)

> Contract Manpower [\$ 105 K]{.underline} (includes contingency)

**Total estimate \$ 173 K \$ 41 K -- obligated in FY02**

> Purchase FMI from Spares \$ 313 K (may be only paper transfer of
> funds)\
> [Manpower:]{.underline} T&M contractor supervision, BD Mechanical:
> disconnect 3 Lambertsons and
>
> B48 abort kickers, modify/reinstall/hookup/commission power, water,
> vacuum, and instrumentation systems, PPD Alignment: as-founds, layout
> of shield blocks and magnet stands, positioning of magnets and beam
> pipes, document final position,
>
> BD/EE: develop, install, and commission shunt supply & controls,
> BD/Tev: commission

[Uncertainties:]{.underline} Actual date of shutdown, need to schedule
rental of 30 Ton capacity forklift for

> moving FMI dipoles and hiring and training/qualifying contract
> manpower

Length of shutdown: if 6 weeks, do it with large amount of contract
labor,

If much less than 6 weeks, will have to use large numbers of Fermilab
staff 24/7

Date of availability of shunt supply/controls -- will not be ready
before 1 Nov, easy for 1 Dec

Is new cable tray needed for shunt cable installation in Tevatron tunnel

Uncertainty if this has to be started without warning -- e.g. if
Tevatron or experiment(s) break

[Priority:]{.underline} 1