Wednesday October 23, 2013

We will meet in TED 2561B on Wednesday October 23 at 3:00 pm EST.

For those calling in we'll use the ReadyTalk audio conference system.

1. Dial Toll-Free Number: 866-740-1260 (U.S. & Canada)
2. Enter 7-digit access code 4402297, followed by “#”

Agenda:

1- Progress at JLab:

 - Chris Tennant will develop an ELEGANT model of the beamline and help characterize the beam coming out of the 1/4 cryo unit
 - Shaun Gregory started the design work for the experiment
 - Jay Benesch is designing a new dipole to achieve the requirements on absolute beam energy
 - George Kharashvili will help with the electron dump design and FLUKA simulation

2- A new "5 MeV" Dipole media:new_5Mev_dipole.pdf media:new_5Mev_dipole.doc

3- Planned beam studies this Fall:

 - Measure beam energy in the 5D line (Bubble Chamber mini-beamline)
 - Measure beam properties coming out of the 1/4 cryo unit
 - Increase gradient of 1/4 cryo unit to achieve 8.5 MeV kinetic energy in the Injector. During PEPPo, achieved 8.25 MeV/c, 
 or 7.75 MeV kinetic energy
 - Measure radiation levels (gamma and neutron) vs beam energy and search for any activation
 - Measure beam current with BCM0L02 and find error on the charge over the range from 1 nA to 100 µA
 - (please see attached note on current monitoring: media:TPC07.pdf )

Drawings: media:mini_beamline1.pdf media:mini_beamline2.pdf

4- Discuss the Bubble Chamber dead time: rates and systematic error. How long does it take to acquire one event?

5- Bubble Chamber progress at Argonne