Answers to Review Panel Questions
 Rajendran Raja
 6-Nov-2004
 
Preamble:-
The Full MIPP program calls for 1.3E6 spill seconds of beam. We assume a DAQ rate
Of 60Hz which yields 78million events. We assume a spill cycle time of 2.8 secs during 
which a double booster batch gets delivered to antiprotons (slip-stacking) and a 0.645 sec flat top
gets delivered to MIPP. To set a scale, we will be assured of 1.3E6 spill seconds if all the spills 
during a 2.2 month period were delivered to MIPP. The current run plan is to run till the 
next shutdown (December 04-July 05) .
 
There are four broad clientele for MIPP data. They are distinguished by beam species and targets.
They are Liquid Hydrogen data for QCD studies, nuclear target data (this falls into two sub-categories proton Nucleus and survey),
NUMI measurements (this uses both thin carbon targets and the full NUMI target) and Atmospheric neutrino measurements (on Liquid Nitrogen).
 
1) What is your plan for commissioning the MIPP spectrometer and determining
when it is ready to take physics-quality data? How much beam time will be
required for commissioning?
 
We have just finished an engineering run during which most of the detector was in working condition.
When we turn back on in December 04, we hope to do commissioning in December 04 and to have a fully working detector beginning January 2005. During the commissioning phase and beyond, we will have all the detector experts in residence at Fermilab to ensure a smooth turn on. We have allocated a 3 million event beam usage for commissioning .See tables below for further details.
 
2) Please present the status of the TPC hardware and software; what is the
estimated tracking efficiency? If the efficiency is less than optimal, how
will this affect your physics goals?
 
The TPC worked well towards the end of the last engineering run. It had a set of anode wires that were tripping during that phase. This has since been fixed. We hope to come up with a TPC with all its channels (Save a few hot pads) working. Each track traversing the whole TPC gets digitized 128 times. These are 180 space points. The TPC has been previously used in experiments at BNL. The tracking efficiency has been measured to be greater than 98% (Y.Torun , Ph.D thesis). We do not expect this to be a problem. The 3-D nature of the digitizations is an enormous advantage while pattern recognizing, since TPC tracks can be swum to chambers in 3D and individual chamber planes can be associated with tracks with no ambiguity.
 
3) Please comment on any existing detector problems that might extend the
amount of time required for startup.
 
We had broken wires in two large PWC planes (chambers 5,6) that straddle the RICH detector and help pattern recognize the tracks that enter the RICH. We have fixed those chambers during this shutdown. We hope to come up with fully working chambers.
We need to understand the drift chamber efficiencies a little better and we hope to do this during the commissioning.
 
The multi-cell CKOV detector did not run during the engineering run with its gas of choice (C4F10), since the gas company delivered the wrong gas!. The CKOV was however full y read out using a CO2 gas during the engineering run. We will use the commissioning phase of the upcoming run to study the CKOV better.
 
We need to understand our interaction trigger better and time in the veto counter that vetoes against halo beam particles better.
 
All other systems, (beam chambers, beam cerenkovs, time of flight wall, RICH, and the EMCAL and Hadron calorimeters) peformed well during the engineering run.
 
 
4) For each of the three beam time scenarios listed in the charge for this
review, please present your run plan and comment on which goals in your
proposal can be achieved.
 
We have divided the data taking into three scenarios as requested. We have had to prioritize our data accordingly, running the high priority items(Priority 1) for the 2E5 spill sec scenario, (Priority 2) for the 5E5 spill sec scenario and (Priority 3) for the 1.3E6 spill sec scenario. We give a summary of our run plan agreed upon within the collaboration here. The exact beam momenta are still being fine tuned, but the tables below broadly give our run plan.
 

MIPP Run Plan: Priority
Priority	1	2	3	Total
M Spill Seconds	0.2	0.3	0.8	1.3
Million Events	12.0	18.0	48.0	78.0
Fraction	0.154	0.231	0.615	1
Ratio	1.0	1.5	4.0	6.5
Run Priority
Sum of Mevents	Priority
Program	1	2	3	Grand Total
Atm. Neutrinos		1.50	1.50	3.00
Engineering	3.00			3.00
MINOS	1.52	2.31	6.18	10.01
pA	2.00	4.00	11.20	17.20
Scaling	2.40	5.50	16.50	24.40
Survey	3.00	5.00	12.79	20.79
Grand Total	11.92	18.31	48.17	78.40
1E5 Spill-Seconds	1.99	3.05	8.03

 
These break down to the individual programs as follows.
 

MIPP Run Plan: Programs
Program	MINOS
Sum of Mevents
Priority	Target	E	Note	Total
1	C	13.3	p only	0.38
		40	p only	0.38
		120	p only	0.38
	NuMI	120	p only	0.38
1 Total				1.52
2	C	20	p only	0.29
		60	p only	0.29
		120	p only	0.58
	NuMI	120	p only	1.15
2 Total				2.31
3	C	13.3	p only	0.62
		20	p only	0.62
		40	p only	0.62
		60	p only	0.62
		120	p only	0.62
	NuMI	120	p only	3.08
3 Total				6.18
Grand Total				10.01

Program	Scaling
Sum of Mevents
Priority	Target	E	Note	Total
1	H	15		0.80
		50		0.80
		75		0.80
1 Total				2.40
2	H	5		1.40
		15		0.40
		30		1.40
		50		0.40
		75		0.40
	D	5		0.30
		15		0.30
		30		0.30
		50		0.30
		75		0.30
2 Total				5.50
3	H	5		3.00
		15		3.00
		30		3.00
		50		3.00
		75		3.00
	D	5		0.30
		15		0.30
		30		0.30
		50		0.30
		75		0.30
3 Total				16.50
Grand Total				24.40

Program	pA
Sum of Mevents
Priority	Target	E	Note	Total
1	Be	120	p only	1.00
	Pb	120	p only	1.00
1 Total				2.00
2	Be	120	p only	2.00
	Pb	120	p only	2.00
2 Total				4.00
3	Be	120	p only	3.00
			p only, 2x target	0.60
	Cu	120	p only	4.00
	Pb	120	p only	3.00
			p only, 2x target	0.60
3 Total				11.20
Grand Total				17.20

Program	Survey
Sum of Mevents
Priority	Target	E	Note	Total
1	Be	50		0.50
	Pb	30		0.50
		50		1.00
	U	50		1.00
1 Total				3.00
2	Be	30		1.00
		50		0.50
	Pb	30		0.50
		50		1.00
		75		1.00
	U	50		1.00
2 Total				5.00
3	Be	5		1.00
		13		1.00
		50		0.81
		75		1.00
	C	5		1.00
		20	pi,K only	0.66
		40	pi,K only	0.66
		60	pi,K only	0.66
	Cu	30		1.00
		50		2.00
		75		1.00
	Pb	5		1.00
		13		1.00
3 Total				12.79
Grand Total				20.79

Program	Atm. Neutrinos
Sum of Mevents
Priority	Target	E	Note	Total
2	N	5		0.50
		13.3		0.50
		30		0.50
2 Total				1.50
3	N	5		0.50
		13.3		0.50
		30		0.50
3 Total				1.50
Grand Total				3.00

 
 
 
5) Finally, please comment on MIPP staffing both for a quick startup and
intense 11-week run, and for an extended (~40 week) run.
 
With our existing manpower, the period 22-Nov-2004—31-March-2005 requires 17 shifts per person. 
This works out to slightly over four shifts per person per month. The same ratios will continue to hold for the full run.
 
However, MIPP is a complex experiment with great physics potential. We can do considerably better with small marginal increases in manpower. To this end, we visited the DoE two weeks ago to ask for support for travel and graduate students for three Universities (Virginia, Iowa and S. Carolina). Offline analysis of data is also shorthanded and would benefit considerably by increasing the post-doc slots for the Fermilab component of MIPP from one to two.