PS LIU-BWS Beam Tests (PS_PXBWSRB011_CR000001) - PowerPoint Presentation

Slide1

PS LIU-BWS Beam Tests (PS_PXBWSRB011_CR000001)(Preliminary results from MD 07-08-11-13/06/2018) Continuation

BE-BI-PM Jose Luis Sirvent Blasco (jsirvent@cern.ch)

1

J.L. SirventBE-BI-PM

LIU-BWS meeting

21/06/2018

1. Scanner operation to date with beam: PS_PXBWSRB011_CR000001

2018/06/07 – 16:15 / 17:25

Total Scans: 176 scansFew scans at low intensity

LHCPROBE (different moments of the cycle)

Problem on pre-injectors! No beam available

Assessment of glass disk fixation and statistics on motion reproducibility.

2018/06/08 – 10:24 / 12:48Total Scans: 206 scansAll Scans with nominal beam CPS.USER.LHCINDIVSingle Bunch: 0.8e11 Protons (Nominal)Scans performed sweeping acceleration cycle with static PMT configs.Two configurations tested: 700V (G~1e5) & No Filter // 900V (G~1e6) & No Filter2018/06/11 – 14:34 / 17:43 Total Scans: 249 scansAll scans with different beam / energies: LHCINDIV, LHCPROBE, TOFSingle bunch: 6e9  7e12Sweeps on acceleration cycles with static PMT configurationsSome reference measurements taken with OP BWS.2018/06/13 -14:57 / 16:22Total Scans: 51 ScansAll scans with LHC25_BCMS Beams (2 Injections  4 + 4 bunches, Splitting 12 bunches, Splitting 48 bunches)Nominal intensity beams with scans at diff Ctime.Static PMT configurationsMD stopped due to problems with the beam…

BE-BI-BL Jose Luis Sirvent Blasco (jsirvent@cern.ch)

2

Total Scans on CPS : 682 + Other Tests

BE-BI-BL Jose Luis Sirvent Blasco (jsirvent@cern.ch)

3

1. Scanner operation to date with beam: Disk Fixation check ~700

Scans (2018/06/07-13)In

Scans Drift

Position at T=

29.6ms2018/06/072018/06/082018/06/112018/06/13

2018/06/07

2018/06/08

2018/06/11

2018/06/13

BE-BI-BL Jose Luis Sirvent Blasco (jsirvent@cern.ch)

4

1. Scanner operation to date with beam:

Projected profiles first

~700

Scans (2018/06/07-13)

No Signs of disk drift!No Signs of disk drift!Crossing Speed ~ 15ms-1Crossing Speed ~ 15ms-1

BE-BI-BL Jose Luis Sirvent Blasco (jsirvent@cern.ch)

5

Interaction

Jitter < 500us

Interaction

Jitter < 600us

SpeedJitter ~ 0.5ms-1SpeedJitter ~ 1.5ms-1

1. Scanner operation to date with beam:

Projected profiles first

~700

Scans (2018/06/07-13)

BE-BI-BL Jose Luis Sirvent Blasco (jsirvent@cern.ch)

6

2018/06/11

2018/06/08

2018/06/07

1. Scanner operation to date with beam:

References detection timing ~625 Scans (2018/06/07-11)

BE-BI-BL Jose Luis Sirvent Blasco (jsirvent@cern.ch)

7

2. Beam size measurements:

Beam profile processing example (2018/06/11 - LHCINDIV)

IN

OUT

BE-BI-BL Jose Luis Sirvent Blasco (jsirvent@cern.ch)

8

2. Beam size measurements:

Beam profile processing example (2018/06/11 - LHCINDIV)

BE-BI-BL Jose Luis Sirvent Blasco (jsirvent@cern.ch)

9

σ

= 2.89 ± 1.3%

σ

= 2.85 ± 1.9%

σ = 1.64 ± 2.2% σ = 1.80 ± 1.7% σ = 1.03 ± 4.1% σ = 1.08 ± 5.1% σ = 0.84 ± 3.8% σ = 0.84 ± 8.2%

σ

= 0.84 ± 1.6%

107 um

88 um

93 um

40 um

102 um

134 um

2. Beam size measurements:

Beam profile processing example (2018/06/11 - LHCINDIV)

Instabilities??

47 um

50 um

No drift on beam centroids!

BE-BI-BL Jose Luis Sirvent Blasco (jsirvent@cern.ch)

10

2. Beam size measurements:

Beam profile processing example (2018/06/11 - LHCINDIV)

0 -101 (700V)

101-200 (900V)

Both configurations including IN + OUT SCANS

BE-BI-BL Jose Luis Sirvent Blasco (jsirvent@cern.ch)

11

3. Metallic disk testing LT-ULTRA RSA905:

Results from disk installed on PSB_CR002 (SN64)

Data from Optical Bench

No significant dropouts in Metal areas

Count-losses are expected (to check engravement finishing)

BE-BI-BL Jose Luis Sirvent Blasco (jsirvent@cern.ch)

12

3. Metallic disk testing LT-ULTRA RSA905:

Results from disk installed on PSB_CR002 (SN64)

Data Mounted on Scanner

Sensor A

Sensor BNo significant runout appreciatedCount losses seen more often?

BE-BI-BL Jose Luis Sirvent Blasco (jsirvent@cern.ch)

13

4. Update on acquisition electronics:

M-PMT PCB’s already available:

Test to schedule in incoming weeks:

Correctness of components / shortcuts.

Functional tests.HV discharge saturation (Max Q allowed per scan)HV saturation crosstalk?Anode Linearity (Max I allowed per pulse)Actions for September installation:1. Decide configuration to assemble in tunnel:A) Current Scint and FW with new PMT assembly.B) New Scint, no FW and new PMT assembly (closer to final).2. Prepare VFC + FMC 1000 in PS crate.Drivers installation (David?) + Server application.Prepare output limited level shifters (match FMC Din.Range)

Mount 1U Supply Box.

Decide to use 3 or 2 VFCs?

A

B

BE-BI-BL Jose Luis Sirvent Blasco (jsirvent@cern.ch)

14

5. Update on 2018 TS1 activities:

SPS: BWS.521 Problem with acquisition electronics (Thanks

Aurelie

!!)

Issue 1 detected  HV Cable was not fully inserted.SHV Connector was hard to insert (connector slightly damaged)Issue 2 detected  FW was stuck between the two switches.Stepper rotates too fast or has too much strength (switches not capable to stop the wheel)Issue 3 detected  Highest attenuation filter (0.005) was out of its holder potentially blocking FW.Old Filters are glued on holders. Actions:FW Fixed placed out of the switches and filter attached with tape in its location. OKNew PMT + Amplifier Tested on tunnel with a F.Generator and surface readout (test CK50 integrity). OKNew System attached to F.Wheel and connected operational cables. Test powering from surface. OK

On Site Scanner wires integrity check, both are fine, resistances ~1.7K and ~2.5K.

OKBefore BWS operation MIDI needs to do a “Go home and Reset”

Tests on tunnel

FW Stuck

PMT installed

Final check (response to random photons)

BE-BI-BL Jose Luis Sirvent Blasco (jsirvent@cern.ch)

15

5. Update on 2018 TS1 activities:

PS: LIU-BWS.54H Testing different grounding techniques.

Detector system was grounded to the PS Beam Pipe.

Measurements up to now were influenced by noise ~ 50Hz and ~16KHz (10-20

mVpp).16KHz seen in every beam (LHCPROBE, TOF, LHCINDIV).Check situation with better grounding to PS or isolating from pipe.Grounded + Amplif ONNot Grounded + Amplif ON

Ringing Period ~3ms

50 Hz not so evident

Ringing Period ~3ms

16Khz

16Khz Not present on these traces

Noise similar with

Amplif

OFF + scopes with 1MOhm

Currently detector is not grounded to the PS pipe.

BE-BI-BL Jose Luis Sirvent Blasco (jsirvent@cern.ch)

16