1. Potential Use of PEP-II Magnets by Project X
Jim Kerby, Fermilab
for the Project X Design Group

2. Project Requirements (1)
The current conceptual design of the transfer line from the 8 GeV H- linac to the Recycler injection straight section utilizes the following magnetic elements:
72 arc dipoles
3 required to ramp to ~500 gauss at 5 Hz for linac dump switch
69 run DC at a field of ~500 gauss
4 vertical dipoles at a DC field of ~500 gauss
45 quads in arc and straight which run on F and D bus at an integrated gradient of 1.3 to 1.6T
20 independently controlled quads with integrated gradients between 1 and 4T.
Horizontal correctors with maximum integrated field of ~0.017T-m
30-35 Vertical correctors with maximum integrated field of ~ 0.009T-m
For the present configuration, Project X has two options for the transfer line magnetic elements: 1) new permanent magnets and 2) re-use PEP II HER magnets.

3. Project Requirements (2)
Configuration uncertainty.
For CD-1 (currently anticipated Oct. 2010) the DoE order 413.3a requires the consideration of alternative designs to meet the mission need.
This investigation could result in a lower energy linac, a new synchrotron, and multiple beam lines all yet undefined.
Depending on the siting of such a facility, the required fields and gradients could exceed the specifications for the PEP-II magnets and/or require additional LCW systems for the Al conductor magnets.
Until the Project X configuration is finalized for CD-1, i.e. linac energy and transfer line layout, FNAL cannot commit to a definite plan for procurement of PEP-II magnets.

4. ICD Configuration

5. Component Requests
Based upon the current conceptual design of the transfer line and the magnetic requirements, the following is a list of PEP-II items that could potentially fulfill the project’s requirements.
86 HER main dipoles
76 for the arc and vertical bend
10 for spares
73 HER 4Q22 quads
65 for transport line
8 for spares
40 HER Horizontal correctors
40 HER Vertical correctors
We cannot use any of the vacuum chambers
If the linac energy remains 8 GeV and the permanent magnet option is selected, Project X is still interested in 6 of the HER dipoles (3 installed + 3 spares) and the correctors.

6. Scheduling
We would like to complete low field measurements on a few magnets in advance of CD-1. Details of the measurements to be worked out.
We will determine the preliminary list of requested magnets by CD-1.
We will finalize the list of requested magnets by CD-2.
We will be in a position to start accepting magnets following CD-3.
The current Project X working schedule (not officially accepted by DOE at this time) shows:
CD-0 in July 2009
CD-1 in December 2010
CD-2 in July 2012
CD-3 in August 2013
the beginning of the installation task starting fall of 2016.