1. Vishnu V. Zutshi for NIU/NICADD
Prototyping Studies for a Scintillator (semi)Digital HCal and a Tail-Catcher/Muon Tracker
Vishnu V. Zutshi
for
NIU/NICADD

2. Outline A scintillator-based 2-bit hadron calorimeter MC studies
Hardware Prototyping
Plans
Tail-catcher/Muon tracker
V. Zutshi, ICLC04, Paris
1/18/2019

3. N vs. E (single hadrons) 0.25mip threshold V. Zutshi, ICLC04, Paris
1/18/2019

4. Single Particle E Resolution
Simple counting of cells above threshold
Single Particle E Resolution
Non-projective geometry
V. Zutshi, ICLC04, Paris
1/18/2019

5. Parameterized Jet E Resolution
Energy Smearing
Fit s as a function of incident E (slide4) and smear neutral hadrons accordingly
g ~ 17%/sqrt(E), generated E for charged hadrons
Jet Reconstruction
pT order stable MC particles (ignoring neutrinos)
start with highest pT particle and cluster in 0.7 cone
repeat for remaining particles
V. Zutshi, ICLC04, Paris
1/18/2019

6. Single Particle Resolution (10GeV)
9cm2 cells
Single Particle Resolution (10GeV)
s/E=0.183
s/N=0.166
V. Zutshi, ICLC04, Paris
1/18/2019

7. Single Particle Resolution (50GeV)
9cm2 cells
Single Particle Resolution (50GeV)
s/E=0.101
s/N=0.153
V. Zutshi, ICLC04, Paris
1/18/2019

8. The Culprit Can be flattened with multiple thresholds
V. Zutshi, ICLC04, Paris
1/18/2019

9. Single Particle Resolution (50 GeV)
After threshold-based weighting of cells
Single Particle Resolution (50 GeV)
s/E=0.101
s/E=0.092
V. Zutshi, ICLC04, Paris
1/18/2019

10. Similar treatment to 10 GeV….
s/E=0.183
s/N=0.164
V. Zutshi, ICLC04, Paris
1/18/2019

11. Applying Photo-Statistics Smearing
V. Zutshi, ICLC04, Paris
1/18/2019

12. Layer Stack
V. Zutshi, ICLC04, Paris
1/18/2019

13. Cosmic Data with PMT
Started with 11pe now ~14 p.e being regularly achieved
V. Zutshi, ICLC04, Paris
1/18/2019

14. Efficiency vs. Noise Rejection
V. Zutshi, ICLC04, Paris
1/18/2019

15. Si-PM and MRS Pixilated (500 to 1000 on ~1mm2) Geiger mode sensor
with high gain and modest
Quantum*geom. efficiency
P. Buzhan et. al
V. Zutshi, ICLC04, Paris
1/18/2019

16. Si-PM’s
V. Zutshi, ICLC04, Paris
1/18/2019

17. Cosmic Data with Si-PM
nPE
V. Zutshi, ICLC04, Paris
1/18/2019

18. MRS Dark Noise Rate
V. Zutshi, ICLC04, Paris
1/18/2019

19. Surface Treatment/Wrapping
UNPOLISHED TOP AND
POLISHED BOTTOM
POLISHED TOP AND
UNPOLISHED BOTTOM
0.98
1.00
1.02
Tyvek
Paint
VM 2002
Mylar
CM590
CM500
Alum Foil
1.00
0.89
1.08
0.83
0.28
0.44
0.63
V. Zutshi, ICLC04, Paris
1/18/2019

20. Thickness vs. weight
If weight and thickness track each other, then it may be possible to monitor paint application via weight only
Check to see if thickness and weight track each other by plotting thickness vs. weight:
2nd set
V. Zutshi, ICLC04, Paris
1/18/2019

21. X-talk Optical x-talk + source spillage All cells connected to pmt
Only central cell connected
Only neighbors connected
1.000
0.985
0.008
0.006
V. Zutshi, ICLC04, Paris
1/18/2019

22. Cells Fabricated
V. Zutshi, ICLC04, Paris
1/18/2019

23. Normalized Response Eljen extruded Bicron
Cell
Groove
Area
Response
Hexagon
Sigma
9.4
1.0
Square
0.88 6
0.92
1.05
Straight
0.81 4
0.85
0.46
0.48
0.58
Since light ample, can optimize for ease of construction
V. Zutshi, ICLC04, Paris
1/18/2019

24. Sigma Groove Uniformity
V. Zutshi, ICLC04, Paris
1/18/2019

25. Straight Groove Uniformity
V. Zutshi, ICLC04, Paris
1/18/2019

26. Scanning over the neighbors
V. Zutshi, ICLC04, Paris
1/18/2019

27. Rainbow Groove
V. Zutshi, ICLC04, Paris
1/18/2019

28. Response Dispersion Overall dispersion<10% V. Zutshi, ICLC04, Paris
1/18/2019

29. RESPONSE LONG AFTER PRODUCTION
0.993  0.006
RESPONSE LONG AFTER PRODUCTION
Column1
Mean
Standard Error
Median
Mode
#N/A
Standard Deviation
Sample Variance
Kurtosis
Skewness
Range
Minimum
Maximum
Sum
Count 30
V. Zutshi, ICLC04, Paris
1/18/2019

30. Summary/Plans Scint. (s)DHCAL looks like a very competitive option….
Simulations indicate approach competitive with analog
Prototypes indicate there is sufficient sensitivity (light x efficiency) & uniformity.
Outlook for optimizing materials & construction to minimize cost looks promising
Intend to take part in the CALICE test beam in collaboration with the Tile-Cal group
V. Zutshi, ICLC04, Paris
1/18/2019

31. Tail-catcher/Muon System
V. Zutshi, ICLC04, Paris
1/18/2019

32. Goals for the TC/Muon System
Provide a reasonable snapshot of the tail-end of the shower for simulation validation
Prototype detector with high-fidelity to what is imagined for a generic LCD
correcting for leakage
understanding the impact of coil
muon reconstruction + eflow
fake rate
V. Zutshi, ICLC04, Paris
1/18/2019

33. On tail-catching For charged pions with >5% of E inside TC
10cm absorber plates
V. Zutshi, ICLC04, Paris
1/18/2019

34. Accounting for material in the coil...
135%/sqrt(E)
V. Zutshi, ICLC04, Paris
1/18/2019

35. Erec/Egen 50 GeV p
V. Zutshi, ICLC04, Paris
1/18/2019

36. Fake Jets Needed to judge the hit occupancy near the muon track
B*  B + p(35GeV)
| D* + m(15GeV)
| p(20GeV)+K(15GeV)+p(10GeV)
Particles are produced in 0.05 cone individually and G4 simulated hits are combined in the analysis program
V. Zutshi, ICLC04, Paris
1/18/2019

37. Fake Jet Angular Width (dR = 0.05)
ECal view
TC view
V. Zutshi, ICLC04, Paris
1/18/2019

38. s(X) w.r.t. previous layer
V. Zutshi, ICLC04, Paris
1/18/2019

39. Stripification
Assign tail-catcher hits to strips of a given size in analysis software
Obtain x or a y co-ordinate from alternate lyrs
Take all combinations
Efficiency is defined as the ratio of the no. of times a pairwise muon hit is found within a road in lyrs N+1 and N+2 when it was present in N and N+1
Rejection = 1-p where p is the fraction of times a non-muon hit combination was present in the road
V. Zutshi, ICLC04, Paris
1/18/2019

40. s(X) with strips Sets the size of the search road
V. Zutshi, ICLC04, Paris
1/18/2019

41. Pairwise ‘Efficiency’
1cm wide strips
Pairwise ‘Efficiency’
V. Zutshi, ICLC04, Paris
1/18/2019

42. 1cm wide strips
‘Rejection’
V. Zutshi, ICLC04, Paris
1/18/2019

43. For >99% efficiency….
V. Zutshi, ICLC04, Paris
1/18/2019

44. Current Guess “Fine” section (8 layers)
2cm Steel, 0.5 cm thick scintillator
Following “coarse” section (8 layers)
10cm Steel, 0.5 cm scintillator
5cm wide strips, 1m long
Tyvek wrapping
Alternating x-y orientation
Si-PM photo-detection
V. Zutshi, ICLC04, Paris
1/18/2019

45. Fermi-NICADD Extruder Line
10cm wide, 5mm thick
Fermi-NICADD Extruder Line
V. Zutshi, ICLC04, Paris
1/18/2019

46. First Measurements
V. Zutshi, ICLC04, Paris
1/18/2019

47. Uniformity
V. Zutshi, ICLC04, Paris
1/18/2019

48. Separation Grooves Provides better rigidity Epoxy/paint mixture 1 2 34 5
Epoxy/paint mixture
V. Zutshi, ICLC04, Paris
1/18/2019

49. Response
V. Zutshi, ICLC04, Paris
1/18/2019

50. X-talk
V. Zutshi, ICLC04, Paris
1/18/2019

51. Response and Strip Fabrication
V. Zutshi, ICLC04, Paris
1/18/2019

52. Uniformity Scan
V. Zutshi, ICLC04, Paris
1/18/2019

53. Strips Wrapped in Tyvek
Each strip wrapped in 2 layers of Tyvek
Strips Wrapped in Tyvek
Compare to separation groove
V. Zutshi, ICLC04, Paris
1/18/2019

54. S/N Signal amplitude Noise amplitude MRS Si-PM
V. Zutshi, ICLC04, Paris
1/18/2019

55. 15 p.e.
Strip Light Yield
V. Zutshi, ICLC04, Paris
1/18/2019

56. Summary/Plans
5mm thick Fermi-NICADD produced extruded strips used in combination with Si-PM/MRS adequate for tail-catcher/muon tracker.
Strip-fiber configuration nearly finalized.
Putting together mechanical module to understand and resolve assembly issues.
Talking with Fermi for cart design and construction.
V. Zutshi, ICLC04, Paris
1/18/2019