Caroline Milstene- Ph.D.



 List of Publications

My Work at Fermilab

LinearCollider

Particle Identification  in the ECal, defining a "Dynamic" shower Maximum
and the Electron to Pion separation using the information of both ECal and HCal.
The data are samples of 5000 single particles between 2 and 50 GeV/c .

Distribution of the Moment of Inertia of the Energy Deposited in the Detector and
Particles ID.(pdf)



Muon ID Was studied on single muons on samples of 5000 events at various
momenta between 2 and 50 GeV/c as well as the separation from pions and
the punchthrough with the SD detector. It was compared to the results
obtained with the Tesla detector and  presented at Arlington Workshop.

  Performance Studies of the SiD Muon Detector.(pdf)  



LC Muon Metting-February 7-03-Momentum dependant cuts were
introduced and the Multiple Scattering and the dE/dx were studied.

  Muon ID Algorithm Development & Multi-Scattering.(pdf)



The Muon Detection study within jets has been performed on 10000 B-Bbar .
  which was presented at the Cornell Workshop-July 2003.

  Muon Identification in B-B_bar Events.(pdf)



LC Muon Meeting- September 26-03-Resolving hadrons Ambiguities using
the Hadron Calorimeter.


 ProgressReport-inB-B_barEvents.(pdf)

LC Muon Meeting- October 03-Differentiating Hadrons and Muons with
the Hadron Calorimeter.
 MoreProgressReport-inB-B_barEvents.(pdf)


Including dE/dx in retracing the charged track to collect the hits in the material
of the Calorimeters both Electro-Magnetic and Hadronic and in the Muon Detector
February11-04.
 TheChargedParticlesStepper-(pdf)

 


Improvment in Muon Detection in Jets with the Stepper & a New Algorithm in HDCAL To Filter Out Hadrons .
  Presented At The Victoria Workshop-28-31July-04
.
Victoria workshop pdf

 


e+ e- --> stop stop_bar--> c Neutralino c_bar neutralino at the linear collider .
  LCFI meeting-9 May 05 2004.

 LCFI meeting-9May-05-.(pdf)


Previous Work I made for OPAL which could benefit the LinearCollider.

The Higgs in the 2 photon channel-
 Detection of The Particles Produced in gamma-gamma
Collisions with OPAL at LEP.(pdf)

Techniques of Measurement of the Tau Polarization in the Tau -> a1-
 Measurement of the polarization of the Tau in the a1 Decay Channel
Using the Information From the Decay Angle Distribution.( ps)

 



A Guide to the Eye:

 I  was Collaborating in the preparation of a very rare  kaon decay experiment
Charged Kaon at the Main Injector CKM at Fermilab.
In conjonction with the corresponding Neutral Kaon channel and the B sector,
this experiment will contribute to measure if the assymmetry between matter
and anti-matter is totally accounted for by the standard model, or partially,
or not at all.
Talk given at the 4th International Conference on Hyperon Charm & Beauty-
June 2000.
This is described in some detail in the presentation linked below, the 1st paper
of CKM(and its 2nd preprint and note CKM_36)

 Charged Kaon at the Main Injector    - Nucl.Phys. B-vol93-(Proc. Suppl)March 2001.

Los Alamos (preprint ex/0009046-) NuclPhysB93.ps.gz
   NuclPhysB93.pdf
 
 

 In the same experiment using the same beam and detector one can also study
other interesting Physics Channels.
I have  also been involved in the study of another physics channel  of charged kaon,
decay produced with higher statistics .
Talk given at the Workshop:Fixed Target Physics at the Main Injector-May 1997,
where the channel simulated for CKM was compared to the data in E761.
This  was the object of the 1st CKM preprint linked below.

 Kaon Radiative Decay K+ ==> Mu+ nu gamma at CKM at the Fermilab Main Injector
-Los Alamos (preprint ex/9803033)   - Note CKM_35.ps.gz
   Note CKM_35.pdf
 
 
 

In  a rare decay experiments a major task is not the measurement  of the channel
of interest but first of all the veto of  backgrounds  much more abondant than the
signal itself.
I have worked extensively in the simulations of the veto system and the studies
of the  inefficiencies related using Geant the simulator developped at Cern.

 The Vacuum Veto system is described in  section 3.2 of the Nuclear Physics paper link.

 - Nucl.Phys.B-vol93-(Proc. Suppl)March 2001-NuclPhysB93.ps.gz
   NuclPhysB93.pdf

In the figure linked below I have represented the required inefficiencies in the
Vacuum Veto System together with the data obtained in the experiment E787
carried out at Brookhaven which had the same sampling propertiesthan our detector,
together with the Geant simulated results for the energies out of  the range covered by  E787.
 

Inefficiencies in the Vacuum Veto System with those obtained in E787 with the same sampling

Below are linked  a presentation given at a collaboration meeting

  Photons_vetos Simulations

as well as the CKM notes with our detailed study of the simulated inefficiencies
shown in the figure above for the Vacuum Veto System.

 Study of the Vacuum Veto System       - Note CKM_20.ps.gz
   Note CKM_20.pdf
 

A similar study has then been done for the Forward Veto System.

 Study of the Forward Veto System for CKM - Note CKM_23.ps.gz
   Note CKM_23.pdf
 

And both are considered in the note A Photon Veto System for CKM
(the pdf version is not avalaible)

 Study of a Photon Veto System for CKM      - Note CKM_25.ps.gz
   Note CKM_25.pdf
 

In relation to the veto system, I have been involved in actual tests
of the properties of plastic scintillators, fibers and photomultipliers
which would be used for the construction of the actual devices and
their light yield.

 Plastic Scintillator for the CKM Veto System-RND   - Note CKM_55.ps.gz
   Note CKM_55.pdf
 

 Study of the light yield from plastic scintillator with green extended fibers
 Study using green extented Photo-Multipliers Tubes     - Note CKM_51.ps.gz
   Note CKM_51.pdf
 

  Study of light yield improvment with fiber gluing or smoothness quality of the fiber groove
 - Note CKM_52.ps.gz
   Note CKM_52.pdf
 

Another important component in such an experiment is the beam which has
to be intense in order to produce the very rare channel  in  sufficient amount
in a reasonnable time, and on the other hand it should be pure enough not to
introduce additional backgrounds. I have also collaborated in the simulation
of the superconducting RF beam using Geant. In the Beam-Geant simulations
written by Rick Coleman, I contribute some flexibility face to constant setup
changes.  A shielding was added on a first attempt to evaluate the muon
background. In a tentative of a 6-digits phase-space comparison Geant-Turtle
I have included the Double-Precision tracking developped by Paul Lebrun for
the Muon Collider and modified the user's routines accordingly. I have also
imbedded  the Poisson Mapping into Geant for the Iron of the dipoles and the
magnets.

 Study of the Muon Background in the CKM Beam at the Fermilab Main Injector
- Note CKM_13.ps.gz
   Note CKM_13.pdf

 Geant Simulation of the RF Separated K+ Beam for the CKM Experiment
- Note CKM_29.ps.gz
   Note CKM_29.pdf
 
 

In the CKM Detector Geant I wrote the code and the digitisation for :
  The Vacuum Veto System,
  The Beam Veto System
       which discards the beam which has interacted  before reaching
  The Kaom Decay volume,
  The Hole Veto System
      which complements the Forward Veto System .
 CKMGEANT Development- "10 easy Bugs" and simple ways to avoid them

 Using Geant I have confirmed that  interactions  and charge  exchange in the
material prior to BIVS are manageables, results first obtained by Jack Ritchie
with his fast Monte-Carlo.
 In order to do so, I have assumed that the UMS had a silicon plane  10cm in radius
and 0.03cm thick.  BIVS  had  a beam hole  10cm in radius and was made of  a lead  tube,
5 meters long and   extending from r=10cm to r=50cm .
The results obtained by Geant-Gheisha in a run of 10Millions events are shown below.
A smaller statistic  run done with  Geant-Flucka give similar limits.

 BIVS -Geant simulated interactions

I have also taken care of the K+  beam generation in CKMGEANT, using the
phase-space distributions extracted from the output of  Beam-Geant.
 The correlations (y, theta_y)  for the  main beam component as well as for the
pion component and the proton component of the beam as can be seen in the
(y,thets_y) figures, see  link  below.

Beam Phase-Space: for Detector-geant
   in format pdf
 

For more sensitive studies, the actual Beam-Geant output
has been used as input of the Detector Geant, this has been
the case in the rate studies linked below.

 Rates in the Veto System  - Note CKM_54.ps
   Note CKM_54.pdf
 

Finally ,to summarize,  as for August 2001, one month before my
guest scientist appointment ended, I  have made significative
contributions in works from Physics to plastic scintillators studies
through simulations in the veto system and beam.  They have been
summarized in 11/55 ckm notes, 2 preprints and one paper  of E921,
a collaboration of ~40 physicists