Design Considerations of Fast-cycling Synchrotrons Based on Superconducting Transmission Line Magnets Page: 1 of 4
This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided to UNT Digital Library by the UNT Libraries Government Documents Department.
Extracted Text
The following text was automatically extracted from the image on this page using optical character recognition software:
FERMILAB-PUB-08-176-APC
DESIGN CONSIDERATIONS OF FAST-CYCLING SYNCHROTRONS
USING SUPERCONDUCTING TRANSMISSION LINE MAGNETS*
H. Piekarz, S. Hays, Y Huang and V Shiltsev, FNAL, Batavia, IL60510, U.S.A.Abstract
Fast-cycling synchrotrons are key instruments for
accelerator based nuclear and high-energy physics
programs. We explore a possibility to construct fast-
cycling synchrotrons by using super-ferric, ~2 Tesla B-
field dipole magnets powered with a superconducting
transmission line. We outline both the low temperature
(LTS) and the high temperature (HTS) superconductor
design options and consider dynamic power losses for an
accelerator with operation cycle of 0.5 Hz. We also briefly
outline possible power supply system for such accelerator,
and discuss the quench protection system for the magnet
string powered by a transmission line conductor.
MOTIVATION: A POSSIBLE NEW
ACCELERATOR COMPLEX AT FNAL
Long baseline neutrino oscillation search experiments
require high-power proton beams to produce neutrino
beams of sufficient intensity. A high-power proton beam
can be achieved using both high rate of protons and high
energy of protons. The fast-cycling synchrotron can
combine both options allowing produce a neutrino beam
of intensities comparable to those expected from the
Neutrino Factories. At Fermilab, a fast-cycling Dual
Super-Ferric Main Ring (DSFMR) accelerator in the
Tevatron tunnel is proposed to serve as a high intensity
proton source for the long baseline neutrino experiments
[1], and in a longer term as an injector to the low energy
ring (LER) of the VLHC [2].
The outline of the proposed new accelerator complex at
Fermilab is shown in Fig. 1. The ring circumference of
6300 m would allow acceleration of proton beam up to
480 GeV with 2 Tesla dipole magnets. With total beam
intensity of 0.5e14ppp, and the repetition cycle of 0.5 Hz
DSFMR can provide up to 4 MW power on two neutrino
production targets (total 8 MW). With such a high power,
one neutrino beam could be directed to a detector at
7500 km away from Fermilab (e.g. Gran Sasso, Italy), and
the other one to a location at ~ 3000 km within the US
(e.g. Mt Whitney, CA). Sending neutrino beams into such
two detectors is a very attractive option for a firm
resolution to the neutrino oscillation physics [3]. The
DSFMR will allow the simultaneous operations of NOVA
and MINOS experiments but with 10 times higher beam
power than presently available at Fermilab.
The DSFMR is also compatible with recently proposed
8-GeV "Project X" SC RF linac which could provide high
intensity proton beam to Main Injector.
*TCis work had been authored by Fermi Research Alliance, LLC under
DOE Contract DE-ACO2-O7CH11359\ Il II \INt}III,0 X. Nir 111k 4Ixkwe
e- kri,'i>
I)E 11NI
F"r I X
Figure 1: Outline of proposed FNAL accelerator complex
Basic parameters of the DSFMR are listed in Table I,
and time sequence for beam stacking, ramping and
extraction onto neutrino targets, or into the VLHC LER
Table I: Parameters of DSFMR synchrotron
Radius Eis1 / Eextr Gap B dB/dt
[m] [GeV / GeV] [m] [T] [T/s]
1000 48 / 480 40 2.0 2.0
rings is shown in Fig. 2. The 8 GeV beam batch from
Project X is transferred to the Main Injector, accelerated
to 48 GeV, and then transferred to one of DSFMR rings
where it awaits for a second proton beam batch from the
Main Injector to arrive. The DSFMR will accelerate both
proton batches up to 480 GeV, and then extract them to
two neutrino beam production lines, or to the LER rings
of the VLHC. In simultaneous extraction to the LER
rings one proton batch is transferred into the clock-wise
VLHC circulation, and the other one into the counter-
clock circulation facilitating setting the colliding mode of
operation.1:an rnrI
2 .ind
lie wer IC [nlrc! #1
M toVI IC'-1 iR I2 ,gttriJ
1-1.im to FatgI, # _'
Im tVi -1 IC A1 7li)
lc ,Vllztc.clctaccs &
'rjc N u. tt ~tr
as . + M It 1 , 10
liii1 t nI .
Figure 2: Time sequence for beam stacking, ramping and
extraction to neutrino production targets or to LER rings.
DSFMR DESIGN CONSIDERATIONS
Upcoming Pages
Here’s what’s next.
Search Inside
This article can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Article.
Piekarz, H.; Hays, S.; Huang, Y.; Shiltsev, V. & /Fermilab. Design Considerations of Fast-cycling Synchrotrons Based on Superconducting Transmission Line Magnets, article, June 1, 2008; Batavia, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc896290/m1/1/: accessed April 24, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.