diagnostics & instrumentation

1 BROOKHAVEN SCIENCE ASSOCIATES

Diagnostics & Instrumentation

Om Singh - Group Leader8th ASAC Meeting for NSLS-II Project

May 10-11, 2011


Outline

• Injector Diagnostics - update

• Storage Ring Diagnostics – update

• Installation schedule

• RF BPM Electronics - status

• Summary


NSLS-II Diagnostics SystemsSystems NSLS-II Vendor

SR BTS LTB Booster Linac GunRF BPM – Single Pass 8 6 5RF BPM – TBT & Stored Beam 180 37ID RF BPM 2 or 3 per IDFill Pattern Monitor (WCM) 3 2Fill Pattern Monitor (FCT or SL) 1 2 2 1Faraday Cup 1 2 1Beam Charge Monitor (ICT) 2 2Fluorescent / OTR Screen 4 9 9 6 6Energy Slit 1 1Photon BPMs 1 or 2 per BLStored Beam monitor (DCCT) 1 1Tune Monitor 1 1Top-Off Monitor 2X-Ray Diagnostics (BM-A Source) 1X-Ray Diagnostics (3PW Source) 1VSLM Diagnostics (BM-B Source) 1 1Transverse Feedback (H & V) 1+1Beam Loss Controls - Scrapers 3 H +2 V Beam Loss Monitors (Cerenkov, Neutron & Fiber optics BLMs)

One set

Status update


Diagnostics for LTB -1 Commissioning

Flag

Flag

Flag

FlagFlagFlag

ICTBPMBPM

Faraday

Cup

Faraday

Cup

FCT

Installed but sees no beam

Safety Shutter

R. Fliller


Deliverables LA qty SA qty Delivery date

PDR 4/18/11

FDR 5/2/11

1st article 1 1 8/10/11

1st production 1 4 9/15/11

Final production 13 12/15/11

Transport Line Flags (by RadiaBeam)

D. Padrazo


Diagnostics Schedule

In Linac Vault

In Booster tunnel

In SR tunnel


Diagnostics Schedule – detail 1


Diagnostics Schedule – detail 2


Diagnostics in ID straight sections - 1

BbB FDBK

Tune Monitor

DCCT

C03HXN

C29

C16

C22

BPMs (w/ High stability stands)

6.6 m

9.3 m

Kosciuk, Tanabe, Hseush, Hetzel

Pingers


Diagnostics in ID straight sections - 2

BPMs

C05SRX - Canted

C28XPD

C10IXS

C11CHX

C23CSX -Canted

BPMs (w/ High stability stands)

BPMs (w/ small aperture buttons)

BPMs (w/ High stabilty stands)

BPMs(w small aperture buttons)

6.6 m

9.3 m

Kosciuk, Tanabe,Hseush, Hetzel


SR Girder

BPM - PTC


RF BPM Electronics - Status

Development & prototype – Held a BPM design review with favorable comments – August, 2010 Hardware issue resolved – no drop out; reduced level of power supply noise Processing gain improved – w/ upgraded PLL design & coherent DSP processing Tested AFE-Spin2 with hardware fixes at ALS – 1/2011 Tested Virtex-6 transitional platform at ALS to validate software – 3/2011 Prototyped & tested Pilot Tone Coupler (PTC) & Chassis – 3/11 Upgrade DFE from Virtex-5 to Virtex-6 FPGA – prototype test ongoing - 5/2011 Test with AFE-Spin3 completed w full functionality – 5/2011

Pre-production run (qty=15) – Chassis & PTC order placed – receive & test 6/2011 AFE & DFE order in progress – receive & test 7/2011

Production run – Start procurement for injector (qty=60) – 7/2011 Start procurement for SR (qty=220) – 10/2011


Virtex-6 DFE – Status

6 SFP Slots

Gigabit Ethernet

RS-232

Virtex-6 LX240T FPGA 2Gbyte DDR3 Memory • New DFE board is working.

• Newer Virtex-6 FPGA• Larger and cheaper FPGA compared to

previous Virtex-5 based board.• Permits more room for Digital Signal

Processing algorithms• Faster DDR-3 improves performance of

MicroBlaze soft-core processor.

• 4 boards received on 4/28/2011• 90% tested. All major components working.

(status as of 5/4/2011)• DDR-3 operating at 800Mbits/s• High speed serial links operating at 5Gbit/s• Gigabit Ethernet & FLASH memory working• Interface to AFE working.

• 6 more boards expected on 5/18/2011

1Gbyte FLASH MemoryJ. Mead & K. Ha


RF BPM Electronics set up – Quantify BPM resolution

DFE – Virtex 6 AFE – Spin3

PTC

Synch clocks – Rev clock, ADC clock and RF clock

ChassisM. MaggipintoB. Bacha


x y

TBT results 0.37 µm 0.37 µm

goals 5.0 µm 3.0 µm

2 kHz results 80 nm 80 nm

goals 600 nm 400 nm

200 Hz results 40 nm 55 nm

goals 300 nm 200 nm

BPM Electronics bench test – preliminary results (5/4/2011)

TBT

2 kHz200 Hz

• Sig gen (~500 MHz) to 1-4 splitter; Splitter output to BPM button inputs• Synch clocks – Rev clock = ~378 kHz; ADC clock= ~117 MHz• Collected 1 M samples of ADC data points; processed with moving filters

K. Vetter

BPM resolution exceeds goalsY

X


• Stability data taken during an overnight 11hr period in a thermally stable rack (0.1 deg C) • The RMS variation is 0.233 µm and 0.289 µm for X and Y respectively.• However, stability goals are 0.3 µm and 0.2 µm.

• In-band pilot tone technique (next slide) will be used to meet stability goals.

BPM thermal drift test

A. DellaPenna


• Software development in progress to implement pilot tone based slow drift compensation• Injected pilot tone between 2nd and 3rd high-side revolution lines at ALS (2-Cam fill)• Measurement show pilot tone band along with revolution lines

In band pilot tone technique - plan

K. Vetter


NSLS-II BPM test results w/ ALS Beam – (single bunch)

Test Set-up• One SR Button to 1-4 splitter• Splitter output to NSLS-II BPM• Single bunch I=23mA (15 nC)

ADC sampled data

One turn

Single bunch resolution

• x = 9.64 microns

•y = 10.3 micronsMeets NSLS-II goals


Test Set-up• One SR Button to 1-4 splitter• Splitter output to NSLS-II BPM• Multi bunch I= 500mA

NSLS-II BPM test results w/ ALS Beam – (multi-bunch)

Multi-bunch TBT resolution

• x = 1.54 microns

• y = 1.62 microns Meets NSLS-II goals

ADC sampled data


TBT

2 kHz200 Hz

x y

TBT results 1.54 µm 1.62 µm

2 kHz results 109 nm 181 nm

200 Hz results 52 nm 131 nm

NSLS-II BPM test results w/ ALS Beam


RF BPM Electronics - Schedule

All BPM’s installed and tested 2 mo prior to start of commissioning

All BPM’s installed and tested 2 mo prior to start of commissioning

After 8 wks in procurement & 12-wks lag for manufacturing startup, BPM’s are fed in groups of (8) units

into test cycle.

After 8 wks in procurement & 12-wks lag for manufacturing startup, BPM’s are fed in groups of (8) units

into test cycle.

SR

Inj & SR

Injector

All production run duration expected to be shorter


Visible SLM Optics Room Layout

Weixing, Fernandes


Loss Control & Monitor (LCM) Sub-systems

2m long x 25cm OD Glass Rod Installation in Dipole

Inj Section

Kramer, Cameron


SUMMARY

• Diagnostics systems are in procurement stage or advanced final design stage

• Installation, system integration and commissioning schedule have been optimized

• Injector & SR diagnostics installation is on schedule for machine commissioning

• RF BPM Electronics In-house design completed for AFE, DFE, PTC & Chassis

Pre-production – to complete in 6/2011

Production for injector & SR on schedule – 7/1/11 & 10/1/11


Acknowledgment

B. Bacha, A. Blednykh, A. Borrelli, P. Cameron, W. Cheng, L.B. Dalesio, J. De Long, P. Ilinski, A.J. Della Penna, L. Doom, M. Ferreira, H. Fernandes, R. Fliller, G. Ganetis, W. Guo, K. Ha, R. Heese, H-C Hseuh, Y. Hu, M. Hussain, E.D. Johnson, B.N. Kosciuk, S.L. Kramer, S. Krinsky, R. Lynch, M. Lucas, M. Maggipinto, J. Malley, J. Mead, A. Munoz, S. Orban, D. Padrazo, I. Pinayev, J. Ricciardelli, J. Rubino, G. Shen, S. Sharma, J. Skaritka, C. Spataro, T. Tanabe, Y. Tian, K. Vetter, W. Wilds, F.J. Willeke, L-H Yu


Back up slides


Transport Line Diagnostic systems

Faraday Cup

Energy Slit


Mitigation of Resonance Modes in Multipole Chamber – RF Shields

Resonance modesWith no rf shield

Blednykh; FerreiraHseuh; KosciukBlednykh; FerreiraHseuh; Kosciuk

• S6 upstream shifts modes to > 800 MHz

S2

S4

S6

500 MHz

Flexible BeCu RF fingers with 50% of opening space

• S6 downstream does not shift out of band but can optimize modes location

•S2 & S4 shifts modes to > 800 MHz


SR RF BPM resolution requirement – Stored beam

Parameters/ Subsystems Conditions *Multipole chamber RF BPM Resolution Requirement

Vertical Horizontal

50 mA to 500 mA Stored beam resolution – 20% to 100 % duty cycle

BPM ReceiverElectronics

Turn by Turn (80% fill) Data rate = 378 kHz 3 μm rms 5 μm rmsAssuming no contribution from bunch/ fill pattern effects

0.017 Hz to 200 Hz 0.2 μm rms 0.3 μm rms200 Hz to 2000 Hz 0.4 μm rms 0.6 μm rms1 min to 8 hr drift 0.2 μm peak 0.5 μm peak

Bunch charge/ fill pattern effects only

DC to 2000 Hz 0.2 μm rms 0.3 μm rms

Mechanical motion limit at Pick-up electrodes assembly (ground & support combined)

Vibrations 50 Hz to 2000 Hz 10 nm rms 10 nm rms4 Hz to 50 Hz 25 nm rms 25 nm rms0.5 Hz to 4 Hz 200 nm rms 200 nm rms

Thermal 1 min to 8 hr 200 nm peak 500 nm peak

*ID straight section RF BPM requirements to be better


6543

21231

SR BPMs and Correctors

Fast correctors (Qty=3)Fast response – 2 kHzWeak strength – 15 μradUtilized for –•Fast orbit feedback

Slow correctors (Qty=6)Slow response – 2 HzStrong strength – 800 μradUtilized for –•Alignment•Slow orbit feedback

BPMs

156 mm slow 100 mm slow 30 mm fast (air core)

SC SC

SCSC

SCSC

FC FC FC


Diagnostics Beamlines Two X-ray synchrotron imaging beamlines with PH camera & CR lenses

1st BM source point in Cell 22 – to measure emittance 3PW source point in Cell 22 – to measure energy spread All optical components are inside tunnel

One Visible synchrotron imaging beamline 2nd BM source point in Cell 30 – to measure temporal and spatial beam properties Location (just downstream of injection straight) - ideal to assist injector tuning A shed for experimental optical table located just outside ratchet wall

Design review held in July, 2010 Comment – “Proposed design for all beamlines is effective to meet all critical

goals for both commissioning and long-term success of the facility”

Status Final design of beam line components in last stage; followed with procurement for

optical components

diagnostics & instrumentation

Documents