MUCOOL MEETING    Jan 22, 99

D. Kaplan, A. Bross, A, Seri, A. Tollestrup, P. Spentzouris, P. LeBrun, M.
Atac 
V. Shitsev, N. Holtkamp, Z. Qian, V. Balbekov, D. Cline, D. Carey, D. Neuffer
E. Black, S. Geer, J. Norem. R. Fernow, F. DeJongh

News:  
  The supplementary Request is going to Bob to be submitted to DOE.

  The IIT grant for design of a target vessel was funded.

  The UCLA meeting on Exotic Cooling Methods is Feb 22-24.

Business:
Andrey Sery described a method for longitudinal (and transverse) cooling using
helical absorbers in a solenoidal field.  The beam enters off center
and begins to spiral and the pitch of the helical absorber is chosen
such that the higher momenta, (longer larmor lengths), travel thru a longer
length of absorber.  The primary variables are the offset of the beam from
the center of the larmor orbit and the beam size and divergence, and the cooling
was described as a function of these variables.

There was discussion of correlations, realistic input parameters, multiple 
scattering and the problems of putting this geometry into DPGeant.

Paul Lebrun reviewed the requirements for a measurement of multiple scattering
for ionization cooling.  The uncertainties in the scattering angle are 
a few percent with additional uncertianties in the magnitude of large angle 
scattering.  Unfortunately both the cooling rate and losses are uncertain
since they
depend directly on the small and large angle scattering numbers.  Estimates of
the 
requirements of muon fluxes (10000) and measurement accuracies (1 mrad) were 
presented,  The detailed design of a muon scattering experiment would require
interaction with the Rutherford staff.

Rick Fernow suggested a fairly simple experiment with a detailed measurement
of the
1/e point, with measurements out to about 4 times the 1/e angle, in 100 steps.

Alvin Tollestrup said he thinks he now understands the Moliere scattering model
and is writing up the result, (which is not in the recent note 16).   He said
that 
Moliere scattering for muons on electrons was complicated by the kinematical 
limit which constrains the maximum scattering angle to a function of the ratio
of the masses.  He then presented estimates of the scattering which seemed to agree
with more detailed calculations.  He described how the model works in the small
angle (multiple scattering), intermediate (plural scattering), and large angle (single)
scattering domain.  A more detailed writeup is in progress.