LAD wiki
LAD Overview
The LAD experiment is set to run in Hall C in September 2024. This wiki will be used to document our weekly meetings, as well as post any other useful information such as proposals, previous publications, other useful links, etc. prior to the experiment running.
| Name | |
|---|---|
| Florian Hauenstein | hauenst@jlab.org |
| Holly Szumila-Vance | hszumila@jlab.org |
| Larry Weinstein | lweinste@odu.edu |
| Carlos Ayerbe Gayoso | gayoso@jlab.org |
Our mailing list is lad_hallc@jlab.org
Weekly Meeting Information
Weekly Meetings are Tuesdays at 09:15 am (remote only)
Please add your presentation/updates or questions before each meeting under the appropriate (month, year) below
November 28 , 2023
- Agenda:
- GEM update (Holly)
- Holly talked Matt Poelker at Jlab. We could get a beam of up to 100keV photons at UITF at Jlab to test the PRAD gems before and after the upgrades with an Aluminum foil for charge deposition. We will get some simulations about the photon distributions
- Faraday shielding design to do
- Test early to mid January
- Laser system update (Florian)
- Everything is on order, fibers to be expected mid-January, laser at Tel-Aviv airport -> rerouted to fiber splitter company. Testing at the splitter company some time in January.
- Bar testing - Dark currents (Carlos)
- GEM update (Holly)
October 17 , 2023
- Agenda:
- LAD bar testing update
- Sara presented initial checks on LAD PMTs ~35% have issues. Sara presentation
- Laser system update
- Or agreed to pay some stuff for the laser system (amazon and thorlabs) or signal generator.
- Other items will be ordered soon.
- GEM Update
- GEM is under gas since weeks, GEM HV will be tested in the afternoon, some confusion about flow rate - some discussion with UVA, 8000cm3 volume of a chamber. at the moment about 3 volume changes per hour -> maybe should be increased.
- LAD bar testing update
October 3, 2023
- Agenda:
- LAD bars update
- Testing started. Some PMTs were already found non functioning
- Laser system update
- Splitter has 14-16 weeks lead time. Laser will be shipped directly to the company.
- No update on the order of the other components
- Draft workplan
- General LAD Hall layout
- LAD bars update
September 19, 2023
- Laser system:
- Axel need to talk with splitter company and Eli for details about shipping laser to them
- Florian need to order fibers and small components (purchase order with the lab)
- Holly is back and starts working on the GEMs
- Setup of LAD bar testing in EEL in progress
September 05, 2023
- New meeting time now 9:15 Tuesdays
- Agenda and Discussions items
- Discussion about the details of the Laser system equipment and open software tasks
LAD Simulation
- More info here when work progresses
LAD Running
LAD Preparation Workplan
Pre-Run Task List
LAD Commissioning and production run plan
- Add here the preliminary plan from the ERR
Targets on ladder: Hall C Target Ladder
- Planned targets:
- D, H, dummy, optics
LAD Trigger Set-Up
The LAD experiment will detect electrons in the SHMS and HMS with recoil protons passing through the GEMs and scintillators.
Tentative LAD Trigger Configuration:
SHMS:
HMS:
COIN:
For trigger definitions, See Trigger Documentation: https://hallcweb.jlab.org/DocDB/0010/001028/005/trigger_v3.pdf
LAD Trigger Checkout:
LAD Cerenkov Gas Mixture
Documents related to the specific PMT type as well as photo-electron yields of the NGC can be found in the links below:
LAD Bars Documents
- Testing in ESB 2023
- ODU Senior Theses:
- CLAS6 TOF NIM paper: File
