SLAC T-510 News
This page lists news from the experiment.
14 Feb 2014 - Status as of Feb 14
- Took data with thin target.
- Finished up near field data taking.
- Took additional ICT data with the transformer closer to the target and with collimators at 10 at 100 mm.
- Might not get the beam tomorrow.
The peak response of the cumulative sum of the ICT as a function of input charge. The linearity is remarkable. Another way to think about this value, is the integral of the ICT response curve up to the zero crossing.
![](/images/ICT_cal_figure3.png)
13 Feb 2014 - Status as of Feb 13
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UHF off-axis measurements and near field data is taken.
12 Feb 2014 - Status as of Feb 12
- Beam is on around 10am
- Running tests to adjust the scope settings for ICT, scintillator, S-band horn.
- Took a lot of ICT calibration data.
- UHF vertical scan of the Cherenkov cone completed
11 Feb 2014 - Status as of Feb 8-11
- Working on DAQ tuning and ICT setup and calibration.
- Took some B-field measurements.
- UHF antenna tower is at the Cherenkov angle.
- Building search is copmleted. Ready for the beam.
28 Jan 2014 - Status as of Jan 28
ESA is in permitted access. Target is surveyed and radiation boundary is removed. Post beam calibration procedures:
- B-field linearity check
- cable calibration
- some DAQ tweaking to increase speed and stability in preparation for the February run.
- pulsing antenna array at the Cherenkov cone
- review and survey the experiment's geometry
B-field on the beam axis. Current is divided among three sections of coils.
![](/images/T-510_mag_lin.png)
27 Jan 2014 - Status as of Jan 27
- Beam is at 11 am. Starting VHF scan.
- Strong CW at 164 MHz. Source unknown.
- Opened a collimator to increase the current. CW does not bother anymore.
- Beam stopped at 9 pm sharp.
- Finished VHF scan. Done taking data.
27 Jan 2014 - Status as of Jan 26
Success! With good beam all day scanned the vertically across the Cherenkov cone. V-pol and H-hol track the cone. Eh-pol/Ev-pol vs B-field is linear. Data looks good, follows theoretical predictions. We have an experiment. Congratulations to everyone!
27 Jan 2014 - Status as of Jan 25
In between the beam tune up for LCLS and SLAC hardware problems, only got about 1 hour of the beam. Resolved issues with flaky scope channels. Test runs 12 through 36. Will live with occasional sync slips. Turned on B-field. Can reach 840G. See strong H-pol signal!
24 Jan 2014 - Status as of Jan 24
- Cabled all scope channels to the antennas
- Fixed some DAQ hiccups
- Beam is intermittent, waiting for it to come back
Diagram of the experiment
![](/images/geometry.png)
23 Jan 2014 - Status as of Jan 23
- More DAQ debugging from the counting house
- ESA closed at 9:55 am for the search
- Search completed at 1:00 pm
- Badges for people on site added to website
- Ready for the first beam shots
- After a long wait due to radiological survey the beam is finally on
- See a strong signal in V-pol (see visualized data in Channel 3). H-pol is not yet connected
Mapped magnetic field
![Bfield X](/images/Bfield_x.png)
![Bfield Y](/images/Bfield_y.png)
![Bfield Z](/images/Bfield_z.png)
22 Jan 2014 - Status as of Jan 22
- More calibration pulsing completed
- Antenna positions marked
- Magnetic field mapped at low current
- Target installed in place
- Moved DAQ computers to counting house
- DAQ debugging continues
- Building cleaned
- Ready for the beam
21 Jan 2014 - Status as of Jan 21
General:- Water for the magnet cooling is hooked up. Few minor leaks found.
- Hang tests for UHF and VHF antenna continue
21 Jan 2014 - Photo galleries are up
The photo and data galleries are now up and running. We will fill them as we go.
20 Jan 2014 - Website is up
The website for the T-510 experiment is up. It has been created using Jekyll.
20 Jan 2014 - Status as of Jan 20
General:- DAQ system multiple waveform readout is fixed.
- First pulser test data is available.
- Another hang test for the UHF antenna tower is conducted on the crane.
- Decided on the scheme for the tilt angle management.
- Connections for the magnet water cooling system are all in place.
- Half of the power cables are connected.
- A grid for the magnetic field mapping is drawn on the target support.
- The first hang test for the VHF antenna mounts is done on the crane.
16 Jan 2014 - Status as of Jan 16
General:- Steel plates are installed, ¼” higher than designed (not a concern)
- Coils are placed into position (not attached to the plates yet)
- Some water hoses are connected
- No main pluming yet
- No power yet
- DAQ system has been set up in ESA
- Scopes are controlled and read out from the counting house
- Initial problems with a long Ethernet cable seems to be resolved
- Read out scripts are completed
- Work in progress on data transfer to a remote server and online plots generation
- Assembled
- First hang test
- Work started on the VHF antenna support.
- Power supplies refurbished
- Water valves replaced
- Leaks fixed (almost)
- EMI survey in ESA building is completed
- Pulser calibration system is assembled and tested
- Antenna position survey plan is developed
- T-510 run plan is submitted