1. Nuclear Physics LOS ALAMOS NATIONAL LABORATORY 1 Line B preparations Hardware issues Install Fast Kicker (up to 200  C/sec). Reinstall Line B transport. Modify line B current limiters to average over 20 sec Improve access to LD2 pit for target installation and operation Radiological issues Shield line C to allow beam delivery to line C with area C with beam in line B. Establish operation procedures to stay below category 3 nuclear facility radioisotope limits

2. Nuclear Physics LOS ALAMOS NATIONAL LABORATORY 2 Source time constants

3. Nuclear Physics LOS ALAMOS NATIONAL LABORATORY 3 Already in place:  Shielding  Power  Water cooling  Cryogenics  Proton beamline SD 2 Source 800 MeV protons from fast kicker Line B/Area B

4. Nuclear Physics LOS ALAMOS NATIONAL LABORATORY 4 New UCN source Removable Tungsten Target Beryllium Neutron Reflector UCN Storage Bottle UCN Guide

5. Nuclear Physics LOS ALAMOS NATIONAL LABORATORY 5 Kicker requirements

6. Nuclear Physics LOS ALAMOS NATIONAL LABORATORY 6 Kicker is budgeted for 2002 by DP (for proton radiography) v >30 Hz operation  6.5  C/pulse  200  C/sec

7. Nuclear Physics LOS ALAMOS NATIONAL LABORATORY 7 LD2 pit access (other options) Possible routes

8. Nuclear Physics LOS ALAMOS NATIONAL LABORATORY 8 Line C access issues Shield Wall Access gate

9. Nuclear Physics LOS ALAMOS NATIONAL LABORATORY 9 Shedule for target changes  t  t StatusCat3 Value * 90 days90 dayson0.561 120 days30 daysoff0.240 210 days90 dayson0.710 240 days30 daysoff0.373 330 days90 dayson0.823 360 days30 daysoff0.480 450 days90 dayson0.923 480 days30 daysoff0.580 570 days90 dayson1.024 600 days30 daysoff0.677 690 days90 dayson1.118 720 days30 daysoff0.774 Table A6.1. Buildup of activities in the SD2 source with 4  A average beam current. Each beam cycle is assumed to be 90 days of beam on followed by 30 days of beam off. The source becomes a Cat 3 facility when the Cat 3 value reaches 1.0. The values given assume 90% beam availability in Line B and 90% accelerator beam availability for a total beam duty factor of 81%. * Eric Pitcher, LANCE 12

10. Nuclear Physics LOS ALAMOS NATIONAL LABORATORY 10 RADIONUCLIDE INVENTORY IN UCN SOURCE AFTER 4 MONTHS CONTINUOUS BEAM AT 10  A * v Both spallation products and capture play a role v Many small contributions v Some important cross sections are not measured ( 187 W) v Steve Wender is working on the same problem for target-4. v 2 target changes per year is possible Nuclide Activity (Ci) Cat-3 TQ (Ci) Ratio Be 11 0.00281.360.0021 B 120.00283.800.0007 C 150.00284.000.0007 P 320.014012.000.0012 P 330.024394.000.0003 S 350.013878.000.0002 Br 760.0590560.000.0001 Rb 830.0693400.000.0002 Y 880.0491280.000.0002 I 1240.00842.40 0.0035 I 1250.12380.560.2210 I 126 0.00870.460.0189 I 1310.00280.920.0031 Ba1280.25021900.000.0001 Ba131 0.44111860.000.0002 La1320.46062000.000.0002 Ce1340.66071540.000.0004 Ce1350.63271580.00 0.0004 Ce1390.79863200.000.0002 Pm1430.77922600.000.0003 Pm1440.0518480.000.0001 Sm145 0.84973600.000.0002 Eu1453.5471640.00 0.0055 Eu1464.1010400.000.0103 Eu1474.61631760.000.0026 Eu148 0.3719380.000.0010 Eu1492.89456800.000.0004 Gd146 2.9755740.00 0.0040 Gd1473.7807860.000.0044 Gd148 0.01470.080.1796 Gd149 4.99062200.00 0.0023 Gd1512.76254000.00 0.0007 Gd1531.74071040.000.0017 Tb1471.10653800.00 0.0003 Tb1493.44323400.00 0.0010 Tb1502.89774400.000.0007 Tb1515.24561700.000.0031 Tb1536.24796000.00 0.0010 Tb1540.4981640.000.0008 Tb155 8.85788800.00 0.0010 Tb1560.1583500.000.0003 Dy1558.53734000.000.0021 Nuclide Activity (Ci) Cat-3 TQ (Ci) Ratio Dy1579.53975600.000.0017 Dy1595.16262400.000.0022 Ho15911.6990108000.00 0.0001 Er16111.62106600.00 0.0018 Tm16213.364042000.000.0003 Tm16619.0580920.00 0.0207 Tm167 16.49002800.00 0.0059 Yb16618.2510840.00 0.0217 Yb16918.58701640.000.0113 Lu16918.82901540.000.0122 Lu17021.2370500.000.0425 Lu171 23.06701400.000.0165 Lu172 4.7172480.00 0.0098 Lu173 3.81443000.00 0.0013 Lu177 0.5365 3400.00 0.0002 Hf17016.9600 2800.00 0.0061 Hf1722.408594.000.0256 Hf17323.01903200.000.0072 Hf17517.31402000.00 0.0087 Hf178*0.001810.400.0002 Hf1811.0501760.00 0.0014 Ta17214.851015800.00 0.0009 Ta17318.50909800.00 0.0019 Ta17418.999019200.00 0.0010 Ta175 21.46503800.000.0056 Ta17624.06501200.000.0201 Ta17723.944054000.000.0004 Ta1794.479130000.000.0001 Ta180 9.79012000.00 0.0049 Ta182 4.5080620.00 0.0073 Ta18310.95803600.000.0030 Ta184 3.34121080.00 0.0031 W 17615.054042000.00 0.0004 W 17716.474011400.00 0.0014 W 178 23.7700 4600.00 0.0052 W 181 31.543013000.00 0.0024 W 185 58.14801380.00 0.0421 W 187387.48102200.00 0.1761 Re181 5.21862200.00 0.0024 Re182 1.18641380.000.0009 Re1821.1864500.00 0.0024 Re1841.4115900.00 0.0016 * Eric Pitcher, LANCE 12

11. Nuclear Physics LOS ALAMOS NATIONAL LABORATORY 11 Some Conclusions  Line B operation at 5  a was routine in LAMPF days * –All the parts have been found –In house expertise exists  Nuclear facility problems are solved by reducing the average current to 4  a and replacing the tungsten annually (biannually if necessary) –No rate problems (experimental duty factor helps) v Access problem is solvable v Minimal impact on PRAD and Lujan can be achieved with a fast kicker –Line C access while source is running –We can use different pulses from target 1 (Lujan target) v We are well on our way to the worlds highest density UCN source. * LAMPF users manual