Hall C KPP Demonstration - PowerPoint Presentation

Slide1

Hall CKPP DemonstrationMarch 10, 2017Slide2

GLOSSARYAcronymDescriptionSHMSSuper High Momentum Spectrometer

NGC

Noble Gas Cerenkov

HGC

Heavy Gas Cerenkov

Shower

Electromagnetic Calorimeter

PSh

Pre-Shower Calorimeter

S1 / S2

Hodoscope

Scintillator

Array 1 / Array 2

PMT

Photomultiplier Tube

TDC

Time-to-Digital ConverterSlide3

Hall C KPP Run PeriodMarch 7–10, 2017Beam

~ 5

m

A CW

Target

BeO

, CarbonSlide4

Hall C KPP Run PeriodSHMS Spectrometer – installation & Project commissioning completeSlide5

Hall C KPP Run PeriodSHMS settings: Momentum: 3 GeV/c Angle: 15º

All magnets operational during KPP run period.

Magnet Current vs Time

Note: to verify polarity, magnets were occasionally ramped down and currents reversed.Slide6

Hall C KPPKPP Demonstration Criteria:Detector running for 8 hours recording data from all subsystems. Screenshots of beam status and/or accelerator e-log entries demonstrating electron beam current and energy.

Data showing relative timing of trigger, tracking, and particle identification in detector subsystems.

Figures demonstrating charged-particle tracks from position-sensitive detectors.

Particle identification plots using signals from calorimetry and Cerenkov detectors.

Detector operational: events recorded with a > 2nA electron beam at > 6 GeV beam energy (3 pass).Slide7

coda@cdaq[4][pts/38]:/net/cdaq/cdaql3data/coda/data/raw#1: Detector running for 8 hours

Label step [

2 hours

]

Beam Current

[

m

A

]

1.

Detector running for 8 hours, recording data from all subsystems.

Snapshot of

Production

run-start log

entries (12h)

Snapshot of

timestamped

datafiles

(24h)

Beam current

stripchart

(12h)Slide8

mA

#2: Beam Status

Beam Established:

Log Entry: 3466542

Beam Energy, Current & Beam Position readbacks show beam to Hall C

E = 6.406 GeV/c

Current = ~ 5

m

A

Snapshot of Target Ladder Camera

Log Entry: 3466543

Shows beam illuminating

BeO

target in Hall C

2.

Screenshots of beam status and/or accelerator

e-log entries demonstrating electron beam current and energy. Slide9

#3: Detector Performance Hodoscope Timing

4

hodoscope

planes in SHMS

S1X, S1Y, S2X, S2Y

Each plane composed of

13–21

individual detectors (“paddles”)Horizontal axis is paddle #

Vertical axis indicates time of hit in nanoseconds relative to trigger

Horizontal red / high-intensity stripe indicates all active paddles in each plane are seeing hits within 5–10 ns of each other

[Left-side PMT signals shown “-”.

Right-side PMT signals “+” ; are essentially the same.]

3.

Data showing relative

timing of trigger

, tracking, and particle identification in detector subsystems.

Paddle Number

Paddle Number

Paddle Number

Paddle Number

Time [ns]

Time [ns]

Time [ns]

Time [ns]

S1X- TDC time vs Paddle #

S1Y- TDC time vs Paddle #

S2Y- TDC time vs Paddle #

S2X- TDC time vs Paddle #Slide10

#3: Detector Performance3. Data showing relative timing of trigger, tracking, and particle identification in detector subsystems.

Time [ns]

PreShower

Left Side Timing

HGC Timing

PMT Number

PMT Number

PMT Number

Time [ns]

Time [ns]

Time [ns]

Time [ns]

NGC Timing

Shower Timing

PreShower

Right Timing

HGC, NGC Timing

Horizontal axis is PMT #

Shower Timing

Horizontal axis is PMT #

Pre-shower Timing

Horizontal axis is PMT #

PMT Number

PMT NumberSlide11

#3: Detector PerformanceWire Drift Chambers2 wire drift chambers

provide tracks for charged particles

6

wire planes

per

chamber

Figure shows time distribution histograms of particles passing by the wires in all 6 planes

All planes have similar timing structure, minimal background

All planes have similar counts indicating equal detection efficiencies

See

Criterion

#4 for track reconstruction

3.

Data showing relative

timing of trigger

,

tracking

, and particle identification in detector subsystems.

Timing relative to Trigger [ns]

Wire Drift Chamber TimingSlide12

#3: Detector PerformanceHeavy Gas Cerenkov (HGC)Filled with

CO

2

Noble Gas Cerenkov (NGC)

Filled with

Argon

Performance plots (right):

Electrons

generate large signal

'Other'

generate no/small signal

Note: Additional particle ID plots associated with

Criterion

#5

3.

Data showing relative timing of trigger, tracking, and

particle identification

in detector subsystems.

NGC

HGC

Number of Photo-electrons

Number of

Photo-electrons

Black = total

Red = electrons

Blue = other

Black = total

Red = electrons

Blue = other Slide13

#4: Detector PerformanceTracking / Event DisplayTwo perspectives on the same event shown in

Hall C

event display.

Red track generated by Wire Chamber data only

Visual confirmation that the other detector elements along the track do indeed see the same particle

[NGC, HGC give negligible position information and are not shown here.]

4.

Figures demonstrating charged-particle tracks from position-sensitive detectors.

Preshower

S1x

S1y

S2x

S2y

Wire Chambers

Shower

Run 488, Event 16Slide14

Electrons

#5: Particle ID

Preshower Energy (arb. units)

NGC Signal (arb. units)

Pions

Preshower Energy (arb. units)

HGC Signal (arb. units)

5.

Particle identification plots using signals from

calorimetry

and

Cerenkov

detectors.

HGC vs PSh

N

GC

vs

PSh

a

rb. = arbitrarySlide15

Electrons

#5: Particle ID

Preshower Energy (arb. units)

Shower Energy (arb. units)

5.

Particle identification plots using signals from

calorimetry

and Cerenkov detectors.

Pions

a

rb. = arbitrarySlide16

KPP DemonstratedDetector running for 8 hours recording data from all subsystems. Screenshots of beam status and/or accelerator e-log entries demonstrating electron beam current and energy. Data showing relative timing of trigger, tracking, and particle identification in detector subsystems.

Figures demonstrating charged-particle tracks from position-sensitive detectors.

Particle identification plots using signals from calorimetry and Cerenkov detectors.

Detector operational: events recorded with a > 2nA electron beam at > 6 GeV beam energy (3 pass).