Proposal of Threshold
Modifications of MQW and P1 and
P2 MQTL BLMs in IR7
Matti Kalliokoski
18th BLM Thresholds WG Meeting
17/08/2015
Introduction
•
Analysis made by Alessio shows that several
monitors in IR7 will surpass their thresholds
with maximum intensity due to debris from
collimators
• The analysis was made in comparison with
the thresholds that are currently in the
machine
•
Not the new thresholds which are foreseen to be
implemented around TS2
17/08/2015
Matti Kalliokoski - 18th BLM Thresholds WG Meeting
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Comparison of Values
Element
MQW
Old
Threshold
MF=1.0
[Gy/s]
New
Required Ratio
Ratio
Threshold Threshold Required / Required /
MF=0.1
[Gy/s]
Old
New
[Gy/s]
2.43E-01 1.33E-02 2.77E-01 1.14
20.8
MQTL P1 4.06E-03 9.77E-05 3.50E-03 0.86
35.8
MQTL P2 4.18E-04 9.77E-05 8.94E-04 2.14
9.15
17/08/2015
•
•
The analysis by Alessio
was made with using
current applied
thresholds with MF=1.0
In the new thresholds
MF=0.1 was foreseen for
LS families
•
Seems to be too low
Matti Kalliokoski - 18th BLM Thresholds WG Meeting
3
THRI_MQW vs THRI.LS_MQW
17/08/2015
Matti Kalliokoski - 18th BLM Thresholds WG Meeting
4
THRI.(IP7).LS_MQW_FT Proposal
•
•
•
Proposed thresholds will be set using MF=1.0
RS9 set to 2.77E-1, others fixed to RS9 with an ad-hoc correction
Needed only for IR7?
• “Standard” thresholds for IR3 with MF=1.0
Running Sum
RS01
RS02
RS03
RS04
RS05
RS06
RS07
RS08
RS09
RS10
RS11
RS12
Ratio FT/Std
1
1
1
1
1
1
1
1.04
2.07
4.60
4.62
4.62
17/08/2015
Matti Kalliokoski - 18th BLM Thresholds WG Meeting
5
THRI_B1.1_MQTLH vs
THRI.LS.P1_MQTL
17/08/2015
Matti Kalliokoski - 18th BLM Thresholds WG Meeting
6
THRI.IP7.LS.P1_MQTL_FT
Proposal
•
•
Proposed thresholds will be set using MF=1.0
RS9 set to 3.5E-3, others fixed to RS9 with an ad-hoc correction
Running Sum
RS01
RS02
RS03
RS04
RS05
RS06
RS07
RS08
RS09
RS10
RS11
RS12
Ratio FT/Std
1
1
1
1
1
1
1
1.96
3.58
9.14
13.21
13.73
17/08/2015
Matti Kalliokoski - 18th BLM Thresholds WG Meeting
7
THRI_B1.2_MQTLH vs
THRI.LS.P2_MQTL
•
•
By using MF=1.0, RS09 is ok, FT from RS10?
With MF=0.1, RS9 set to 8.94E-04 Gy/s, FT correction from RS08
17/08/2015
Matti Kalliokoski - 18th BLM Thresholds WG Meeting
8