cdc summary
DESCRIPTION
CDC Summary. Shoji Uno (KEK) July-8, 2009. Baseline Design. sBelle. Belle. Tentative drawing by Kohriki-san. Connection regions 1. Endplate and Outer cylinder. Main and Conical (Backward). Connection regions 2. Main and Conical. Backward. Forward. Connection regions 3. - PowerPoint PPT PresentationTRANSCRIPT
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CDC Summary
Shoji Uno (KEK)
July-8, 2009
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Baseline Design
Belle
sBelle
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Tentative drawing by Kohriki-san
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Connection regions 1
Endplate and Outer cylinder Main and Conical (Backward)
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Main and Conical
Connection regions 2
Forward Backward
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Conical and Small cell
Small cell and Inner cylinder
Connection regions 3
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Wire tension and gravity sag
Nanae Taniguchi (KEK)
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sag calculation
tension(total
tension)
80g(4.4 ton)
100g(5.2 ton)
120g(6.2 ton)
sag(field) - sag(sense) 84.8μm 28.4μm -9.2μm
sense wire : 30μm, 50gw
wire length : 2.4 m
y
horizontal cell
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wire tension and gravity sag
Current Belle CDC
• wire tension is determined to keep the gravity sag of sense and field wire same
• 50gw for sense wire and 120gw for field wire
• total tension = (50gw x 8400) + (120gw x 8400 x 3) = 3.4 ton
Belle-II
• number of sense wire: 8400 →15104
• total tension = (50gw x 15104) + (120gw x 15104 x 3) = 6.2 ton @ same weight
• reduce total tension : 120gw → 80gw (base line design) , 6.2 ton → 4.4 ton
• however difference of gravity sag is larger
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HV=2.3kV (sense wire)B = 1.5 T
C2H5:50% He:50%
simulation using Garfield
10
±0.1mm
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current Belle position resolution
~ 100μm
-0.1mm
+0.1mm
tension(total tension)
80g(4.4 ton)
sag(field) - sag(sense) 84.8μm
sense wire : 30μm, 50gw
(x: distance from sense wire at nominal case)
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Mechanical calculations of the
CDC end-plates
KEK H. Yamaoka
July 8th, '09KEK H. Yamaoka
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0.3
kg/mm1073.0EEE
:Al
0.3
kg/mm769G
kg/mm101.1E
kg/mm100.2E
kg/mm102.0E
Cyl.r Outer/Inne:CFRP
12
0.3
5769kg/mmG
kg/mm100.2E
kg/mm100.2E
kg/mm101.5E
Plates End:CFRP
xy
24zr
xy
2xy
24z
24
24r
xy
2xy
24z
24
24r
xy
rxy
EG
Material propertiesLoad conditions
Constraints
R: Free: FixedZ: fixedRotR: FixedRot: FreeRotZ: fixed
Total: 3725kg
Definitions for FEM
No inner cylinder
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2.9mm 2.7mm
31MPa
Results - End-plates: 10mm-thick(Al), Outer-cylinder(CFRP): 5mm-thick.
Deformation
Stress
Deformation
Stress
<107Mpa : allowed limit
<5mm : Belle-CDC
![Page 15: CDC Summary](https://reader036.vdocuments.net/reader036/viewer/2022081417/568143a0550346895db01eee/html5/thumbnails/15.jpg)
Material: CFRP
Dia. 340mm
Length: 1000mm E : 110GPa : 0.3
2322kg
4.54.01702
2
:load Buckling
545.4
170
4.0101.16.035.01
170
4.0
105.1
6.0C
0.35
is , therefore425, 170/0.4R/t
fig.10 from Determined :
buckling elasticfor 1 :
stress Buckling :
2
4
24
c
crcr
ccr
cr
ccr
rtP
MPammkg
R
EtC
mmR
mmt
mmkgE
R
EtC
12474kg
6.148.01702
2
:load Buckling
14614.6
170
8.0101.16.047.01
170
8.0
105.1
6.0C
0.47
is , therefore212.5, 170/0.8R/t
fig.10 from Determined :
buckling elasticfor 1 :
stress Buckling :
2
4
24
c
crcr
ccr
cr
ccr
rtP
MPammkg
R
EtC
mmR
mmt
mmkgE
R
EtC
t=0.4mm t=0.8mmBuckling strength: Inner cylinder
Wire tension: 371kg
Safety Factor : 6
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Readout board spaceTest board 16ch 48ch(~300boards in total)
20cm
17.5
cm
Should be fit in volume
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CDC readout system status
MT 2009 July 7
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Test board for test(prototype readout card will be designed based on this.)
Small tube chamber (tungsten wire)Fe55 5.9 keV X-rayGas(Ar90%+CH410%), P10 Gas
1.65kV
16ch
Ampshaper
AD9212x2
TDC&L1 buf
RocketIO
RMS=0.47ns
This AmpShaper was developed for other application.Modification will be done by Dr. Taniguchi.
FPGA-TDC has been used for J-PARC.
Firmware design will be done by Dr.Uchida
PCB was designed by Mr. Saito and Mr. Ikeno
RocketIO will be tested by Dr. Igarashi
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FPGA Block diagram
FADC I/FADC
TDC ASD
Ring buffer
5usec500nsec window
ReadoutFIFO
Q(sum)&
Data formatter
SiTCPOr
RocketIOI/F
Slow controlDAC, ADC, Ring buffer etc
Trigger
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Pre-AMP test
Nanae Taniguchi (KEK)
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pre-Amplifier
Hybrid(NEW+)
Rise time is limited by chamber signal → not need to be so fast → lower electric power
The modified PZC cause noise
Found overshoot
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set upsmall tube chamber
• p10 gas (Ar 90% + CH4 10%)
• Fe55 5.9 keV X ray (~3xMIP)
• HV = 1.575 kV (below saturation point)
make uniform each pulse height
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signal shape
Belle AMP
12dB 13dB 3dB1dB
Hybrid(NEW+)
make uniform each pulse height with attenuator
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definition
Resolution =
Noise level =
Fit to Fe55 data with Double Gaussian
Fit to pedestal data with Single Gaussian
pedestal(random TRG)
Fe55
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comparison
AMP resolution[%] noise level[%]
7.58 1.64
8.10 0.61
7.46 0.41
8.57 1.11
7.74 1.16
Hybrid(NEW+)
3rd and 4th Hybrid AMP have lower noise
Noise level is enough low
• resolution is worse in actual situation
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set up
Timing resolution measurement with pulse generator
TDC
• 500ns range
• 0.125ns/ch
start
stop
51Ω1kΩ
0.1μF
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Resolution
Fit to data with Double Gaussian
Resolution is calculated as weighted sigma
TDC
• range 500ns
• 0.125ns /ch
TDC distribution
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comparison Resolution [ns]
AMP rise time ~20ns ~ 40ns
0.64 1.53
0.73 1.76
0.64 1.54
0.79 1.91
0.65 1.59
Hybrid(NEW+)
4th Hybrid AMP is comparable with (better than) Belle AMP
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Summary of ADC/TDC measurement
4th Hybrid AMP is usable for base design
We discuss about parameters for prototype of ASIC AMP with T-Taniguchi-san (electronics group)
• We will have meeting again before making ASIC pre-AMP
another plan of TDC measurement using laser @ TUAT
• signal from chamber
• master student is working for the test
Finally, We must do beam test with ASIC AMP
• MIP signal and He/C2H6 gas
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Schedule(short term)Firmwarew/o rocket IO
Amp shaper
Test with rocket IO
End of Aug.
prototyping
End of Sept. Nov.
modification
Preparation for beamtest
Design and feedback submission
PCB design
Uchida
Taniguchi, Shimazaki
Nakao, Igarashi
Saito, Ikeno
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My Personal Plan for Construction
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Backup
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Main parameters Present Future
Radius of inner boundary (mm) 77 160Radius of outer boundary (mm) 880 1096
Radius of inner most sense wire (mm) 88 168Radius of outer most sense wire (mm) 863 1082
Number of layers 50 58Number of total sense wires 8400 15104
Effective radius of dE/dx measurement (mm) 752 928Gas He-C2H6 He-C2H6
Diameter of sense wire (m) 30 30
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Introduction
Mechanical calculations of CDC end-plates was carried out. Load: Wire tension ~4000kg in total. Material: Outer cylinder CFRP End plates Aluminum, CFRP Assumption: All wire tension is supported by the outer cylinder.
CDC
End-plate
Deformation(< 5mm), Stress?Buckling strength?
~R
109
0
~2400
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Wire configuration Given by Taniguchi-san
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Distributions of wire tension in R-direction
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Wire tension and gravity sag
small gravity sag, large total tension
distance between sense wire and field wire has z-dependence
asymmetric electric field
• asymmetric X-t curve
same distance from sense wire(x), different drift time
affect the position resolution
gravity sag
field
sense
field
r
horizontal cell
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δx nominal
move sense wire position by amount of +/- 0.1mm
put an electron along x-axis
calculate the distance from sense wire and drift time
obtain X-t curve
calculate δx
• δx is difference of x at same timing
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current Belle position resolution
~ 100μm
-0.5mm
+0.5mm
-1.0mm
+1.0mm
-0.1mm
+0.1mm
tension(total tension)
80g(4.4 ton)
sag(field) - sag(sense) 84.8μm
sense wire : 30μm, 50gw
(x: distance from sense wire at nominal case)
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Calculation of deformation and etc
Deformation of Aluminum endplateThickness of endplate 10mm
Tension of field wire 120g 80gGravitational sag, Sense : 190m(50g),
Field:300m(80g)Unequal sag Nane-san’s talk
Total tension ~4ton Deformation Yamaoka-san’s talk
Stress calculation
Thickness of outer cylinder CFRP : mm Transition structure between endplate and
outer cylinderBucking calculation for inner cylinder
Larger tension for many wires ( ~400kg) Yamaoka-san’s talk
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WeightEndplate
Al, Thickness : 10mm 110kgx2 = 220kg Outer Cylinder
CRRP, Thickness : 5mm 210kg
Electronics Board G10, 48ch/board
0.3kgx315 = 95kg
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Wire configurationSo far,
8(A),6(U),6(A),6(V),6(A),6(U),6(A),6(V),8(A), 58 layers in total
But, Readout board 64ch/board 16x4 No good
assignment 48ch/board 16X3
8(A) 2(A)+6(A) inner most super layer2(A) special treatment 160x2=320 :
48x7=336 8(A) 6(A) outer most super layer
56 layers in total Good assignment Other good idea is highly welcome.
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Calculations of buckling strengthRef: E.H.Baker, et. al. 'STRUCTURAL ANALYSIS OF SHELLS'
The buckling strength of the outer/inner cylinder is calculated.
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Assumptions
Material: CFRP
Dia. 2190mm
Length: 2328mm
E : 110GPa
: 0.3
315039kg
9.130.510902
2
:load Buckling
13913.9
1090
4.0101.16.046.01
170
5
101.1
6.0C
0.46
is , therefore218, 1090/5.R/t
fig.10 from Determined :
buckling elasticfor 1 :
stress Buckling :
2
4
24
c
crcr
ccr
cr
ccr
rtP
MPammkg
R
EtC
mmR
mmt
mmkgE
R
EtC
8218kg
2.10.110902
2
:load Buckling
121.2
1090
0.1101.16.02.01
1090
0.1
101.1
6.0C
0.2
is , therefore1090, 1090/1.0R/t
fig.10 from Determined :
buckling elasticfor 1 :
stress Buckling :
2
4
24
c
crcr
ccr
cr
ccr
rtP
MPammkg
R
EtC
mmR
mmt
mmkgE
R
EtCIf t=5.0mm
If t=1.0mm
Wire tension: 3725kg
Buckling strength: Outer cylinder
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Outer Cyl.
CFRP Thikness Deformation Stress Deformation Stres5mm 2mm 17.6mm 312MPa 13.0mm 616MPa
5 3 11.6 180 8.3 3275 4 8.6 118 6.0 1935 5 6.8 85 4.7 1235 6 5.5 66 3.7 865 7 4.6 53 3.1 735 8 3.8 44 2.6 635 9 3.3 37 2.2 555 10 2.9 32 1.9 48
1 10 3.5 33 2.5 512 10 3.0 33 2.2 503 10 3.2 33 2.0 504 10 3.0 32 2.0 49
End Plates(Al) End Plates(CFRP)
Tensile(t) N/mm2
Yeild(σy) N/mm2
F -1 F-1=σy 205 195 205F-2 F-2=0.7*σt 280 161 364F Smaller value 205 161 205
Allowable stress(MPa)Long Short Long Short Long Short
Tension ft=F/1.5 137 205 107 161 137 205
Shearing fs=F/(1.5√ 3) 79 118 62 93 79 118
Bending fb=F/1.3 158 237 124 186 158 237
Hertz stress fp=F/1.1 186 280 146 220 186 280
Bolt(Tension) ft=F/2 103 154 81 121 103 154
Bolt(Shear) fs=F/(1.5√ 3) 79 118 62 93 79 118
Bolt(Hertz) fp=1.25F 256 384 201 302 256 384
Roller fp=1.9F 390 584 306 459 390 584
Welding(PT) fs=F/(1.5√ 3) 79 118 62 93 79 118
Welding(No PT) fs=0.45F/(1.5√ 3) 36 53 28 42 36 53
Long term:
Short term:
400220
230195
520205
StainlessMaterial SS400
SUS304AluminumA5052-H32
Conditions
Static load
Seismic, Thermal load
Long x 1.5
Calculation results in various parameters
Allowable stress ( Japanese: Koukozo sekkei kijun ) This criterion was used for the mechanical design of the Belle.
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- If deformation has to keep less than 5mm,thickness of end-plates should be thicker than 7mm(Al). Calculation at the practical configuration will be necessary.- To know the mechanical properties of CFRP is important, We have contacted to a CFRP fabricator.
Configuration
END
ConclusionMade by Kohriki-san
http://wiki.kek.jp/display/~yamaokah/CDC
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層 R(mm) Z+(mm) Z-(mm) 数 角度 1 A 172.0 602.6 -337.9 160 0.0 2 A 182.0 635.3 -355.2 160 0.0 3 A 192.0 668.0 -372.6 160 0.0 4 A 202.0 700.7 -389.9 160 0.0 5 A 212.0 733.4 -407.2 160 0.0 6 A 222.0 766.1 -424.5 160 0.0 7 A 232.0 798.8 -441.8 160 0.0 8 A 242.0 831.5 -459.2 160 0.0 9 U 266.0 910.0 -500.7 160 37.0 10 U 282.0 962.4 -528.4 160 37.1 11 U 298.0 1014.7 -556.2 160 37.3 12 U 314.0 1067.0 -583.9 160 37.4 13 U 330.0 1119.4 -611.6 160 37.4 14 U 346.0 1171.7 -639.3 160 37.5 15 A 368.0 1441.4 -641.4 192 0.0 16 A 384.0 1444.1 -644.1 192 0.0 17 A 400.0 1446.9 -646.9 192 0.0 18 A 416.0 1449.7 -649.7 192 0.0 19 A 432.0 1452.4 -652.4 192 0.0 20 A 448.0 1455.2 -655.2 192 0.0 21 V 464.0 1458.0 -658.0 224 -36.9 22 V 480.0 1460.7 -660.7 224 -38.1 23 V 496.0 1463.5 -663.5 224 -39.3 24 V 512.0 1466.3 -666.3 224 -40.4 25 V 528.0 1469.0 -669.0 224 -41.6 26 V 544.0 1471.8 -671.8 224 -42.7 27 A 562.0 1474.9 -674.9 256 0.0 28 A 580.0 1478.0 -678.0 256 0.0 29 A 598.0 1481.1 -681.1 256 0.0 30 A 616.0 1484.3 -684.3 256 0.031 A 634.0 1487.4 -687.4 256 0.0 32 A 652.0 1490.5 -690.5 256 0.0 33 U 670.0 1493.6 -693.6 288 46.8 34 U 688.0 1496.7 -696.7 288 47.9 35 U 706.0 1499.8 -699.8 288 49.0 36 U 724.0 1502.9 -702.9 288 50.1 37 U 742.0 1506.0 -706.0 288 51.2 38 U 760.0 1509.1 -709.1 288 52.3 39 A 778.0 1512.3 -712.3 320 0.0 40 A 796.0 1515.4 -715.4 320 0.0
層 R(mm) Z+(mm) Z-(mm) 数 角度
41 A 814.0 1518.5 -718.5 320 0.0 42 A 832.0 1521.6 -721.6 320 0.0 43 A 850.0 1524.7 -724.7 320 0.0 44 A 868.0 1527.8 -727.8 320 0.0 45 V 886.0 1530.9 -730.9 352 -56.0 46 V 904.0 1534.0 -734.0 352 -56.9 47 V 922.0 1537.2 -737.2 352 -57.9 48 V 940.0 1540.3 -740.3 352 -58.9 49 V 958.0 1543.4 -743.4 352 -59.9 50 V 976.0 1546.5 -746.5 352 -60.8 51 A 994.0 1549.6 -749.6 384 0.0 52 A 1012.0 1552.7 -752.7 384 0.0 53 A 1030.0 1555.8 -755.8 384 0.0 54 A 1048.0 1558.9 -758.9 384 0.0 55 A 1066.0 1562.0 -762.0 384 0.0 56 A 1084.0 1565.2 -765.2 384 0.0 57 A 1102.0 1568.3 -768.3 384 0.0 58 A 1120.0 1571.4 -771.4 384 0.0
張力分布 ( リスト )
Z+
1
X
Y
Z
End plates(Al): t10mm, Outer cyl.(CFRP): t5mm
JUN 23 200914:13:28
NODES
内筒なしZ+
R+(X+)
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Prototype CDC readout card (FY2009)# of channels(Total: ~ 15000)
48 ~ 64ch/boardAmp shaper
Shaping time: ~ 100nsecGain: ~ 1V/1pC ( TBD)
Dynamic range:2pC ( TBD)TDC FPGA TDC
Timing resolution:1nsecADC
Resolution:10bitSampling rate: ~ 32MHz
L1 bufferDepth:5usec max
Test board was developed to determine above paramsusing test chamber.
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Specification of Test board(detail)Analog(Amp-shaper for DB-decay exp)
Peaking time: ~ 50nsec OKPulse width: ~ 200nsec OKGain : 8V/pC 1 ~2 V/pC
Dynamic range : 2V max OKNoise : ~ 2500 e @ 40pF OK
FunctionADC 10bit 32MHz
TDC 1nsecL1 buffer : 5usec max
Two modes for data formatWaveform data readout mode
Compression mode Timing and Q
These values will be confirmed by beam test
BLR modification has been done
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Amp shaper modification
CMOS digital
BLR
Analog buffer
Amp shaper
Bias circuit
Present Amp shaper
We started development of Amp-shaper for BELLEII CDC.
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FunctionL1 buffer length : 5usec Max variable
Newold
Trigger
Window(for Q info:) 500nsec variable
Timing data and Q or waveform data areTransferred to external interface
ADC waveform
Comparator output
Data format will be determined within a month
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52
AMP study
Determine parameters for prototype of ASIC AMP
• Test some kinds of Hybrid AMP before making ASIC
• Compare with current Belle AMP
Belle-II AMP is required to be comparable or better than current one
purpose
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53
signal shape
Belle AMP
12dB 13dB 3dB1dB
each pulse height corresponds to that of Fe55 X-ray signal at 1.575 kV
rise time ~ 20ns and ~ 40ns
Hybrid(NEW+)
pulse generator (reverse)
same pulse for all AMP
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conclusion
parameters of prototype ASIC are almost decided
base design of Wire tension are determined
structure analysis by H. Yamaoka-san
Wire configuration and Endplate
under discussion now
Plan structure test of CFRP
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conclusion
parameters of prototype ASIC are almost decided
base design of Wire tension are determined
structure analysis by H. Yamaoka-san
Wire configuration and Endplate
under discussion now