1. SPS UA9 data taking run with LHC-type Goniometer 31/07/2015 – Collimation Upgrade Specification Meeting #60 Roberto Rossi Daniele Mirarchi, Stefano Redaelli, Walter Scandale Special thanks to EN/STI, BE/OP, BE/RF and BE/ABP for support during the data taacking

2. Table of contents Introduction SPS July run overview Procedure timeline Performance of crystal on piezo-goniometer Conclusions R. Rossi - SPS UA9 MD with LHC Goniometer2 31/07/15

3. Introduction SPS UA9 runs are used to test the principle of crystal-assisted collimation system. UA9 apparatus is placed in the LSS5 of the SPS where scintillators and BLMs are used to measure beam losses downstream any key device. 3R. Rossi - SPS UA9 MD with LHC Goniometer 31/07/15 Reduction Factor =AM losses CH losses AM CH

4. July run overview This run was a kick-off of UA9 measurements in 2015. Update wrt the last year are: Installation of Piezio-Goniometer Prototype (same as the two installed in LHC) Installation of CpFM Prototype New read-out electronics (Wave Catcher) used for the first time to get the scintillators signals Special read-out COBRA card for CpFM. This electronics is suited for FFT analysis of CpFM signals in the range [Hz-GHz] 31/07/15 R. Rossi - SPS UA9 MD with LHC Goniometer4 UNDERGROUND INSTALLATION Piezo-Goniometer CpFM Other 3 runs this year

5. July MD overview 31/07/15 R. Rossi - SPS UA9 MD with LHC Goniometer5 SPS has an issue with a quadrupole causing orbit shift -> scans are affected by spikes Starting from this run BPM are used in online and offline analysis to detect the beam orbit variation.

6. Procedure Timeline 31/07/15 R. Rossi - SPS UA9 MD with LHC Goniometer6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 1 2 3 4 5 6 7 8 9 10 Beam Set-up Operation with standard goniometer CpFM and Scintillators Set-up LINAC Intervention Piezo-Goniometer Operation LHC Fill + Injection problems CpFM and COBRA operations Operation with standard goniometer Some stops during the run (intervention/problem/LHC fill) Anyway the scheduled program was fully completed

7. Piezo-Goniometer test - overview 31/07/15 R. Rossi - SPS UA9 MD with LHC Goniometer7 17 18 19 20 21 22 23 24 1 2 17 18 19 22 23 24 1 2 Instrumentatio n Alignemnt Angular ScanInstrumentatio n Alignemnt Angular Scan CH orientation found Angular Scan at different speed (2 and 0.5 urad/s) and stability test Piezo Linear Alignemnt Piezo Linear Alignemnt In both cases the alignment of the crystal last less than 15 min. The angular scan to find Channeling (CH) orientation last more than two hour of operation. expected orientation around -1800 urad, found at around 4200 urad (6mrad away) 15’

8. Piezo-Goniometer test Piezo-Goniometer is a prototype developed under the supervision of A. Masi (EN/STI). Fundamental test of the hardware for future LHC experiments: – two goniometers are already installed in the LHC – a laboratory test bench device has allowed to develop and test a sophisticated, optimised control system – the goniometer installed in SPS was used for the first test with the beam during the data taking in July The alignment procedure was completed very quickly (less than 15’). The scan to find the channeling orientation took longer then expected. – The crystal alignment procedure completely different from the past: 31/07/15 R. Rossi - SPS UA9 MD with LHC Goniometer8 Old caseCrystal aligned directly wrt the beam line New caseCrystal aligned wrt tank, and tank is aligned wrt the beam line (as LHC)

9. Piezo-Goniometer Crystal QMP39 o LHC-Type holder (titanium) o 4 x 5 x 30 [mm] (z x x x y) o Deflection angle ~160 urad 31/07/15 R. Rossi - SPS UA9 MD with LHC Goniometer9

10. Piezo-Goniometer scan Fast angular scan performed at 2urad/s to find CH orientation 31/07/15 R. Rossi - SPS UA9 MD with LHC Goniometer10 Crystal @ 5σ Reduction factor = 4.38

11. Piezo-Goniometer test 31/07/15 R. Rossi - SPS UA9 MD with LHC Goniometer11 Crystal @ 4.37σ TAL @ 8.2σ Detailed angular scan performed at 0.5urad/s around CH orientation lowest speed with mechanical goniometers 1urad/s Reduction factor = 4.31

12. Piezo-Goniometer scan propaedeutic test for angular stability during linear motion – Crystal in channeling orientation retracted and inserted again of 10 mm – We observed that crystal was still in CH – Next step comparative analysis to evaluate the influence of angular oscillation due to linear movement before and after system improvement (1 st September MD) 31/07/15 R. Rossi - SPS UA9 MD with LHC Goniometer12 Angular stability with crystal fixed orientation In particular the behaviour of this decreasing

13. Conclusion Achievements The Piezo-Goniometer is reliable enough for standard UA9 operation in SPS Promising results for LHC test Next Goal in SPS in view of the LHC test  Test the upgrade made to increase the stability of rotational stage during linear motion  Test the reproducibility of the scan, knowing the crystal CH orientation 31/07/15 R. Rossi - SPS UA9 MD with LHC Goniometer13