DESIGN CONSIDERATIONS AND EXPECTATIONS OF A VERY LARGE HADRON COLLIDER Page: 3 of 4
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The study of proton colliders at very large energies has been done in different occasions at several
times and several locations. We can certainly rely and draw experience from existing operating
hadron colliders at Fermilab and in CERN, and from projects like the SSC and the LHC that have
been designed in details. Beyond the SSC energy of 20 TeV, the ELOISATRON Project has
evolved through a sequence of Workshops that were held in Erice during the many past years.
More recently, after the discontinuity of the SSC project, explorations of very large proton collid-
ers with beam energy in the range of several tens of TeV are emerging again in USA, like RLHC
and PIPETRON. It is obvious that these projects can also be identified with the ELOISATRON
Project, since they all share the same motivations and goals. It is clear that the ELOISATRON
Project represents the ultimate circular hadron collider, which needs to be defined, well beyond
the LHC and the SSC.
The pioneering work in the field was done during the summer of 1984 at Snowmass, Colo-
rado, when a hadron collider dominated by the synchrotron radiation effects [1,2] was investi-
gated. It was determined already at that time that these effects are significant and beneficial at the
beam energy of 40 TeV, but also that they have very limited consequences at the energy of 20 TeV,
when the beam performance is essentially determined by the properties of the injector. The major
difference between then and now is that at that time a bending field of 6.5 Tesla was assumed, the
value of the SSC project. Today this may sound a conservative figure, since higher field may be
soon reached and will be more beneficial to the overall collider performance.
It is easily agreed that the synchrotron radiation dominated collider would represent truly
the ultimate hadron collider at the highest energy and luminosity. Looking back with the wisdom
of the after, if the SSC should today be proposed again for construction, very likely one would
consider a higher field, for instance 13 Tesla to take advantage of the effects of the synchrotron
radiation. This would either reduce the size, and thus maybe cost, by a factor of two, or conversely
double the team energy to 40 TeV for the same original size.
 A. G. Ruggiero, "Synchrotron Radiation Effects in a Very Large Hadron Collider",
Proceedings of the 1984 Snowmass Workshop, page 451.
 R. R. Wilson, "Proton Cooling by Radiation". Proceedings of the Workshop on Producing
High Luminosity High Energy Proton-Antiproton Collisions, page 155. March 1978.
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RUGGIERO,A.G. DESIGN CONSIDERATIONS AND EXPECTATIONS OF A VERY LARGE HADRON COLLIDER, article, November 4, 1996; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc703237/m1/3/: accessed June 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.