Wednesday March 18, 2015

We will meet in TL 2221 on Wednesday March 18 at 3:30 pm EST.

For those calling in we'll use the Blue Jeans [1] audio conference system.

Phone number: 1-888-240-2560
Meeting ID: 3528502673#
Meeting URL: http://bluejeans.com/3528502673

Agenda:

1- Bubble Chamber progress at Argonne:

media:Bubble_Chamber_March2015_photo1.jpg

media:Bubble_Chamber_March2015_photo2.jpg

media:Bubble_Chamber_March2015_photo3.jpg

media:Bubble_Chamber_March2015_photo4.jpg

---

Notes from this meeting:

• Bubble Chamber:

1. Ready to fill with mercury and N₂O - planned for next week
2. Need to do thermal modeling of temperature gradient across chamber
3. Argonne will build short stand for chamber to fit JLab beamline

• Fluorine Chamber C₄F₁₀ is still of interest:

1. Test Bremsstrahlung beam and Penfold-leiss unfolding
2. Measure sensitivity to gammas (of interest to dark matter search, now at 10^-10)
3. Measure ¹⁹F(γ,α)¹⁵N at low energy (E_electron = 4 - 7 MeV)

• JLab Schedule:

1. At 2K from June 20^th to September 30^th
2. Now we have a clear path forward toward pressure vessel approval