1. Kenneth Wraight, Andrew Blue, Kate Doonan & Sam Crawley
SLAC
Kenneth Wraight, Andrew Blue, Kate Doonan & Sam Crawley

2. SLAC
04/09/2018
Andy Blue

3. Remote control required.
End Station A
Remote control required.
04/09/2018
Andy Blue

4. ESTB is parasitic beam from Linac Coherent Light Source
Parasites & Particles
ESTB is parasitic beam from Linac Coherent Light Source
Secondary beam of electrons up to 13.6GeV of LCLS beam
5Hz standard bunch frequency
Variable particle number per bunch
SLAC benefits
Triggering available from
beam
Larger region of
interest than previous
scintillator limited area
Reduced multiple scattering
Possible to take data with
more devices in beam
04/09/2018
Andy Blue

5. Data taken with various conditions
Beam Conditions
Data taken with various conditions
5 & 10Hz frequencies
dependent on LCLS users
Varying charge per bunch
Dependent on LCLS users
some control with beam slits
Consistent beam energy of 12.5GeV
Used multiple devices in beam
2 – 4 devices used --> 6 – 10 sensor planes
Limited by available power, mounts and cooling for devices
More made as testbeam developed
04/09/2018
Andy Blue

6. Telescope and device setup
Telescope visiting from DESY from April to July
Far side
(Mimosa 5)
Beam side
(Mimosa 0)
Devices
<-- mounted
and
cooled -->
04/09/2018
Andy Blue

7. (Remote) Control of devices
EUTelescope
Config for runs (devices)
(semi-)Online monitor (not full quad monitor)
RCE
Usd to read out pixel devices
Setting configs and thresholds
DCS
Voltage settings (HV > 500V, low voltages were 1.2V & 1.5V)
Humidity & temperature monitors
Teamviewer
Linked to laptop in beam hall
Peltier control and additional temperature monitoring
04/09/2018
Andy Blue

8. Tue 28/4 arrived in Palo Alto
Itinerary
Tue 28/4 arrived in Palo Alto
Wed 29/4 arrived SLAC: training and registration
Thu 30/4 access to ESA: basic tour
Fri 1/5 set-up and tune devices, begin data taking with Q5
Found out customs holding irr. devices over weekend
Sat 2/5 data taking: Q5 and singles
10Hz periods, variable beam conditions
Sun 3/5 data taking: singles
Mon 4/5 set-up for irr. devices, data-taking: singles
Receive irr. devices around noon; irr. quad and 125x100 broken
Tue 5/5 data-taking: singles + Igor's angled measurements
Wed 5/6 dismantle set-up
04/09/2018
Andy Blue

9. Quad – data taken: 3 regions @ 100V, THL=2500 & 3000e
Unirradiated
Quad – data taken: 3 100V, THL=2500 & 3000e
250x50 – data taken: 50 & 100V, THL=2500e
500x25 – data taken: 50 & 100V, THL=1.5, 2, 2.5, 3 ke
125x167 – data taken: 50 & 100V, THL=2500 & 3000 ke
irradiated
Quad – no data: unable to tune, 15V (no analogue)
250x50 – data taken: 0V, THL=1.5, 2, 2.5, 3 ke (broken bonds?)
500x25 – data taken: 100V, THL=1.5, 2, 2.5, 3 ke
125x167 – data taken: 100V, THL=1.5, 2, 2.5, 3 ke
04/09/2018
Andy Blue

10. Limited bias of device due to large leakage current
Irr. 500x25 IV
Limited bias of device due to large leakage current
04/09/2018
Andy Blue

11. Initial cluster scans
Used online monitor and initial clustered reconstruction to check data quality
2k triggers
2k triggers
04/09/2018
Andy Blue

12. Can see structure in 125x167 online monitor
125x167 structure
Can see structure in 125x167 online monitor
Unbonded pixels due to mismatch of geometry 14

13. Facility Telescope Detectors
Experience
Facility
Very helpful local support: from equipment to personnel
>21hrs beam/day (2hrs MD); always updated by MCC
Presence of other users important i.e. 5->10Hz (+ beam energy)
Telescope
After ironing out a few bugs, everyone gained experience
Important to have experts available: Martin, Igor, Jens
Bonus of triggering from beam
DCS system was simple and easy to use: Voltage, humidity, temp
Detectors
Despite customs trouble, managed good runs
Multiple devices tested in beam (e.g. Q+2sc, 4sc)
04/09/2018
Andy Blue

14. Experience of facility very positive
Conclusions
Experience of facility very positive
Most training could be done online prior to arrival
Local support very helpful: Philippe Grenier, Max Swiatlowski
Very helpful with equipment & requests: cabling, dry ice
Great experience for testbeam team
Running all aspects of data-taking from Peltier cooling to configuring telescope
Excellent beam conditions
Triggering: larger RoI
Energy: more devices possible per run
Potential for increased statistics in future
04/09/2018
Andy Blue

15. Proposal needed Contacts Data taking Reconstruction
Advice for Strips work
Proposal needed
Sergio will write 1 for FCF work
Volunteered to help write the abc130nm proposal
Being a registered SLAC user should hopefully help
Contacts
For telescope issues, Igor Rubinsky
For SLAC/facility issues, Philippe Grenier & Carsten Hast
Data taking
Can tune beam spot to less than we had
Can control no. electron per bunch from 1-3 to 100 (at 5Hz)
Are we anywhere near max occupancy for some of these numbers?
After alignment data taking time should not be too long
Reconstruction
Currently standard for pixels
More than happy to use our experience to help adapt for Strips
CMS already tested strip devices with this telescope. Access to recon?...

16. Back up
Back up
04/09/2018
Andy Blue

17. Trigger is from a scintillator attached to 1st telescope plane
Triggering
Trigger is from a scintillator attached to 1st telescope plane
Only a fraction of coverage of 1 CMOS chip
Scintillator
Quad Module
Reference sensor 19 19

18. Use automated stage to change position of beam
Quad RoIs
Use automated stage to change position of beam
Beam size of ~2x2cm (Perfect!)
Centred
Beam
up from Centre
Beam Left of Centre